Re: assignment in a for loop
MackS [EMAIL PROTECTED] writes: Thank you for your reply. A pleasure to help. What's preventing the use of list comprehensions? new_list = [x+1 for x in old_list] Suppose I want to do anything as trivial as modify the values of the list members _and_ print their new values. List comprehensions must not contain statements, I think. You're correct, but that's because you're creating a new list, not modifying the existing one. The list comprehension can do anything you like to generate each element, so long as it's an expression:: foo = [3, 5, 8] print [x+1 for x in foo] [4, 6, 9] print [x**2 for x in foo] [9, 25, 64] print [str(x**2) for x in foo] ['9', '25', '64'] print [len(str(x**2)) for x in foo] [1, 2, 2] If it's too complex to be readable in a single expression, make it a function which returns a value, since calling a function is itself an expression:: def get_result_of_complex_stuff(n): ... quad = n**4 ... if len(str(quad)) % 2: ... word = spam ... else: ... word = eggs ... result = word.strip(s).title() ... return result ... foo = [3, 5, 8] print [get_result_of_complex_stuff(x) for x in foo] ['Egg', 'Pam', 'Egg'] Once you have your new list being created by a list comprehension, do what you like with it. If you want it to be stored, assigned back to the original name, each value printed, or whatever you like, then do so:: bar = [get_result_of_complex_stuff(x) for x in foo] foo = bar for x in foo: ... print x, ... Egg Pam Egg -- \ One time a cop pulled me over for running a stop sign. He | `\said, 'Didn't you see the stop sign?' I said, 'Yeah, but I | _o__) don't believe everything I read.' -- Steven Wright | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: A Unicode problem -HELP
manstey wrote:
a=str(word_info + parse + gloss).encode('utf-8')
a=a[1:len(a)-1]
Is this clearer?
Indeed. The problem is your usage of str() to render the output.
As word_info+parse+gloss is a list (or is it a tuple?), str() will
already produce Python source code, i.e. an ASCII byte string
that can be read back into the interpreter; all Unicode is gone
from that string. If you want comma-separated output, you should
do this:
def comma_separated_utf8(items):
result = []
for item in items:
result.append(item.encode('utf-8'))
return , .join(result)
and then
a = comma_separated_utf8(word_info + parse + gloss)
Then you don't have to drop the parentheses from a anymore, as
it won't have parentheses in the first place.
As the encoding will be done already in the output file,
the following should also work:
a = u, .join(word_info + parse + gloss)
This would make a a comma-separated unicode string, so that
the subsequent output_file.write(a) encodes it as UTF-8.
If that doesn't work, I would like to know what the exact
value of gloss is, do
print GLOSS IS, repr(gloss)
to print it out.
Regards,
Martin
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Re: A Unicode problem -HELP
manstey [EMAIL PROTECTED] wrote:
I have done more reading on unicode and then tried my code in IDLE
rather than WING IDE, and discovered that it works fine in IDLE, so I
think WING has a problem with unicode.
Rather, its output defaults to ASCII.
So, assuming I now work in IDLE, all I want help with is how to read in
an ascii string and convert its letters to various unicode values and
save the resulting 'string' to a utf-8 text file. Is this clear?
so in pseudo code
1. F is converted to \u0254, $ is converted to \u0283, C is converted
to \u02A6\02C1, etc.
(i want to do this using a dictionary TRANSLATE={'F':u'\u0254', etc)
2. I read in a file with lines like:
F$
FCF$
$$C$ etc
3. I convert this to
\u0254\u0283
\u0254\u02A6\02C1\u0254 etc
4. i save the results in a new file
when i read the new file in a unicode editor (EmEditor), i don't see
\u0254\u02A6\02C1\u0254, but I see the actual characters (open o, esh,
ts digraph, modified letter reversed glottal stop, etc.
Of course. Isn't that exactly what you wanted? The Python string
u\u0254 contains one character (Latin small open o). It does NOT contain
6 characters. If you write that to a file, that file will contain 1
character -- 2 bytes.
If you actually want the 6-character string \u0254 written to a file, then
you need to escape the \u special code: \\u0254. However, I don't see
what good that would do you. The \u escape is a Python source code thing.
I'm sure this is straightforward but I can't get it to work.
I think it is working exactly as you want.
--
- Tim Roberts, [EMAIL PROTECTED]
Providenza Boekelheide, Inc.
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Re: A Unicode problem -HELP
manstey [EMAIL PROTECTED] writes: 1. Here is my input data file, line 2: gn1:1,1.2 R)$I73YT R)[EMAIL PROTECTED] Your program is reading this using the 'utf-8' encoding. When it does so, all the characters you show above will be read in happily as you see them (so long as you view them with the 'utf-8' encoding), and converted to Unicode characters representing the same thing. Do you have any other information that might indicate this is *not* utf-8 encoded data? 2. Here is my output data file, line 2: u'gn', u'1', u'1', u'1', u'2', u'-', u'R)$I73YT', u'R)$IYT', u'R)$IYT', u'@', u'ncfsa', u'nc', '', '', '', u'f', u's', u'a', '', '', '', '', '', '', '', '', u'B.:R)$I^YT', u'b.:cv)cv^yc', '\xc9\x94' As you can see, reading the file with 'utf-8' encoding and writing it out again as 'utf-8' encoding, the characters (as you posted them in the message) have been faithfully preserved by Unicode processing and encoding. Bear in mind that when you present the input data file, line 2 to us, your message is itself encoded using a particular character encoding. (In the case of the message where you wrote the above, it's 'utf-8'.) This means we may or may not be seeing the exact same bytes you see in the input file; we're seeing characters in the encoding you used to post the message. You need to know what encoding was used when the data in that file was written. You can then read the file using that encoding, and convert the characters to unicode for processing inside your program. When you write them out again, you can choose the 'utf-8' encoding as you have done. Have you read this excellent article on understanding the programming implications of character sets and Unicode? The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!) URL:http://www.joelonsoftware.com/articles/Unicode.html -- \ I'd like to see a nude opera, because when they hit those high | `\ notes, I bet you can really see it in those genitals. -- Jack | _o__) Handey | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
cross-compile PIL
Hello, I need to compile PIL (python imaging library) package for an ARM based linux system. Does anyone can tell me how to do this ? Thanks Nicolas -- http://mail.python.org/mailman/listinfo/python-list
formEncode and validation depended on forms field
Hi all. I'm using formEncode to validate my forms, and I'm stopped on how to do a complicated validation that depened on what forms element was filled. I mean in my code (without formEncode) i have: if form.select is checked: #if select is checked then I checked for others fields on form #if select is not checked that I abandon validation code... else: if form.login != '' and form.password !='': code.. else: code.. How to achieve something like this in formEncode? i can validate all form but I need validate some fields of form only if others form are filled. Thanks for any help Gregor -- http://mail.python.org/mailman/listinfo/python-list
Re: build now requires Python exist before the build starts
[EMAIL PROTECTED] wrote: It shouldn't actually be required. I'm assuming the problem is while trying to run asdlgen.py. The generated files are checked in, but the timestamps are wrong and the Makefile is trying to be helpful. Try: touch Include/Python-ast.h Python/Python-ast.c make Thanks, indeed it is a timestamp problem. However I copied the error message 'build now requires Python exists before the build starts' directly from the Makefile. It might be instructive that the Makefile also mentions that this is not strictly necessary and documents that python is needed if one wants to regenerated Python-ast.[hc]. Thanks a lot, toon -- http://mail.python.org/mailman/listinfo/python-list
CFLAGS are not taken into account properly
To configure python on a Solaris 9 box with sunstudio11 installed and to compile it in 64bit, I execute following: code export CC=cc export CFLAGS=-xarch=v9 export CXX=CC export CXXFLAGS=-xarch=v9 export F77=f77 export FFLAGS=-xarch=v9 export LDFLAGS=-xarch=v9 ./configure /code When doing 'make' afterwards, the '-xarch=v9' option is not on the command-line however? Should'nt the CFLAGS be propagated to the Makefile that is generated by configure? Or is there any other way to do this? Thanks in advance, toon -- http://mail.python.org/mailman/listinfo/python-list
Re: Option parser question - reading options from file as well as command line
Andrew Robert wrote:
Hi Everyone.
I tried the following to get input into optionparser from either a file
or command line.
The code below detects the passed file argument and prints the file
contents but the individual swithces do not get passed to option parser.
After reading your post I decided to play around with optparse a bit,
to get acquainted with it.
Experimenting with IDLE I found that the Values object returned by
parse_args has a method 'readfile', and this 'readfile' method allows
you to add options to the Values object.
The syntax should be in the form:
option=value
option should not include the hyphens -- if your option is added as
'-x', then you should write:
x=3
not:
-x=3
If you have options with both long names and short names, then you
should use the long name -- if your option is added as '-f', '--file',
then you should write:
file=foo.txt
not:
f=foo.txt
Also, you need the assignment-operator in your file.
I didn't find any documentation on this, and I didn't try this with any
actions; only with options added to the parser like
op.add_option('-x', dest='x')
Using this 2-step approach allows you to use optparse itself to get to
the command-line option with your command-line settings...
Out of pure personal interest, what queuing-system are you writing to
from Python? What libraries do you have for that? And is it commercial
software, or freely downloadable?
(I'd love to be able to write messages to IBM MQ Series from Python)
Cheers,
--Tim
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Re: Tabs versus Spaces in Source Code
achates wrote: Duncan Booth wrote: However the important thing is that a tab does not map to a single indentation level in Python: it can map to any number of indents, and unless I know the convention you are using to display the tabs I cannot know how many indents are equivalent to a tabstop. Sorry but this is just wrong. Python works out the indentation level for a source file dynamically: see http://docs.python.org/ref/indentation.html. The particular algorithm it uses is designed to accommodate people who mix tabs and spaces (which is unfortunate, and should probably be changed). Nevertheless, using tabs only, one tab does indeed map to exactly one indentation level. One tabstop == one indent, on your editor and on mine. Please be careful how much you trim. I also wrote: Using spaces everywhere allows this, using tabs everywhere allows this, mixing spaces and tabs is a bad thing. Yes, if you use tabs only tabs map to exactly one indentation level, but as soon as there is a mix it breaks horrible. The problem arises because in most situations there is no visual distinction between tabs and spaces so it isn't obvious when there is an accidental mix until things break. Fortunately Python is reasonably robust, and in most cases you will get a syntax error instead of a silent change to the meaning of the code. You do not need to know my display convention to run my code. The Python interpreter does not know your display convention either: it assumes that tabs expand to 8 character boundaries. So long as you have pure tabs this doesn't matter, but if there is any mixing it means that any editor set to expand tabs to a different width will no longer display the indentation as the interpreter sees it. The problem is that although you are a tab purist (as I am a space purist), too many people out there are neither. If you set an editor to only insert spaces then it is unlikely to accidentally insert tabs, but if the editor is set up to do indentation with tabs then a naive user is still likely to use the space bar occasionally and then wonders why Python is complaining about an error when they can see (with their 4 space indents) that everything is indented correctly. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Duncan Booth enlightened us with: In particular a common convention is to have indentations at 4 spaces and tabs expanding to 8 spaces. Aaaw that is SO ugly! Sure, it displays correctly on systems that have tab stops every 8 spaces given a monospaced font, but that is about all that is positive about that. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: the tostring and XML methods in ElementTree
Fredrik Lundh wrote: [EMAIL PROTECTED] wrote: I wanted to see what would happen if one used the results of a tostring method as input into the XML method. What I observed is this: a) beforeCtag.text is of type type 'str' b) beforeCtag.text when printed displays: I'm confused c) afterCtag.text is of type type 'unicode' d) afterCtag.text when printed displays: I?m confused the XML file format isn't a Python string serialization format, it's an XML infoset serialization format. as stated in the documentation, ET always uses Unicode strings for text that contain non-ASCII characters. for text that *only* contains ASCII, it may use either Unicode strings or 8-bit strings, depending on the implementation. the behaviour if you're passing in non-ASCII text as 8-bit strings is undefined (which means that you shouldn't do that; it's not portable). I was about to post a similar question when I found this thread. Fredrik, can you explain why this is not portable ? I'm currently using (a variation of) the workaround below instead of ET.tostring and it works fine for me: def tostring(element, encoding=None): text = element.text if text: if not isinstance(text, basestring): text2 = str(text) elif isinstance(text, str) and encoding: text2 = text.decode(encoding) element.text = text2 s = ET.tostring(element, encoding) element.text = text return s Why isn't this the standard behaviour ? Thanks, George -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Duncan Booth enlightened us with: It is strange. You use many of the same words as me, but they don't make any sense. You forgot to add to me to the end of that sentence. Personally, Achates' words made perfect sense to me. The point is about separating the presentation of the source file from the semantic content. When displaying the file you can choose to expand tabs to any suitable positions. These may be evenly spaced every n characters, or may vary across the page. True. However the important thing is that a tab does not map to a single indentation level in Python: it can map to any number of indents, True, but doesn't the same hold for spaces? An indent level can be made from any number of spaces. You could use two spaces to indent a class' contents, four for functions, and two again for loops. and unless I know the convention you are using to display the tabs I cannot know how many indents are equivalent to a tabstop. That is only true if you mix spaces and tabs. If you use only tabs OR only spaces to indent, everything is perfectly clear. Seriously people, this is about separating the content of a source file from how it is displayed. It's about letting people work together while also allowing them to have control over their own environments, something which is and always has been central to the hacker ethos. Precisely. Using spaces everywhere allows this No it doesn't! I have tabstops every four characters, which is a pleasant indent level for me. Other people have trouble reading the code that way, and want two or eight character wide indents. When using tabs, everybody can place the tabstops for themselves, and as long as tabstop N is more to the left than tabstop N+1, everything is fine. By using spaces, the writer of the code determines the size of the indentation, not the viewer. Since code is generally read more than it is written, the viewer is quite important. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
I think Duncan has hit the nail on the head here really. I totally agree that conceptually using tabs for indentation is better than using spaces. Pragmatically though, you can't tell in an editor where spaces are used and where tabs are used. Perhaps if editors colored the background of tab characters differently from spaces this wouldn't be a problem, or if Python was more restrictive and did not actually allow a mix of tabs and spaces for indentation there would be no problem - the compiler could throw out an exception for mixed characters. In reality, neither of these are likely to be implemented any time soon! The following quote sums things up nicely I think: In theory there is no difference between theory and practice, but in practice there is. (No idea where I got that from BTW - someone's tag-line probably) -- http://mail.python.org/mailman/listinfo/python-list
Re: Using python for a CAD program
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Cool. thanks for the links. I've already looked around quite a bit, and am very hesitant to just write more shit on top of other shit. All software suck. If you think that yours will not then: a) you are a narcissist b) you are the only user c) all of the above The idea behind this is it's completely mine. So yes, I have a tendency to want to reinvent a few wheels, but I think it'll give me greater satisfaction. *I* think you bite off way too much and will waste two years and never get anything usable done. The problem with geda, etc., is that it's taking the unix approach -- a buncha little command line tools that somehow make a system, using text files as communication medium. That is because this approach actually works, it is proven in serious work, it can be tested without writing a test application of about the same complexity as the real job and it deals neatly with the users needs for automation without forcing the application to contain thick, bloated object management code for the users extensions. I hate that, largely because it allows the infectious spread of little files all over your system, encourages people to write scripts from outside the system that probably won't work for you, and exposes the user unnecessarily to the implementation of where you keep files, directories, blabla. Wrong on many levels: The idiot users will get into trouble no matter what you do; while the user that is smart enough to write an extension will need to deal with the implementation anyway. You, the developer, has to decide on wheather it is smarter to write your very own object manager, API's and the user/developer documentation thereoff or leave it to the operating system by simply using what is already there. I'm more of the windows approach, where you have one integrated environment, and any text you type is from within the application itself, and most application-related data is hidden from the user unless he *really* wants to get at it. I.M.O. The reason for the integrated windows approach is simply because that OS lacked/lacks efficient tasks, interproces communication and it does not support scripting. So each developer will end up rolling his own monolith and because all the code monkeys see this, it becomes the way. (disclosure: I've never actually installed geda, but I tried icarus once and couldn't get it to compile -- another bane of open source stuff I can't stand. The odds are great that the problem is to be found in front of the screen rather than the code. I'm not a CS person, so when I download something, I just want it to work, and I don't get off trying to *make* it work...). Another reason for doing this on my own is that I'd like a general-purpose CAD/design framework, of which electrical/IC design is only one part. Also, I think geda simulations are spice-based, which is batch, And this matters ... in what way exactly?? which is sooo your-father's buick, which I hate as much as text files... aaand another thing is I'm very big on user-experience. Experience over Functionality. I see - well, it worked for Bill. The knowledge workers forced to use the pretty etch-a-schetch tools are less than happy and will seek to minimise the pain by avoiding most of the alledged functionality. Last time I felt the pain of the little used feature was setting headers and footers in Excel - No, it does NOT work the same as in Word (work is perhaps a strong word). I'd like my program to *look* slick, like it belongs in a movie or something. I think that means starting from scratch, since I've not seen any CAD program take any artistic/human/psychological approach to its design. That *is* true - the problem with CAD programs are that they need the *exact* details to be entered at design time so one cannot easily schetch in them and fix the design errors later. But it does not follow that there is a need for rewriting the rendering engine or the design rules checker - you could actually achieve something by writing a tool that allow an existing CAD system to support the way designers actually work so that they use the tool up front instead of as it is now where CAD is the digitiser for a paper-based design. -- http://mail.python.org/mailman/listinfo/python-list
Re: simultaneous reading and writing a textfile
On 2006-05-16, Peter Otten [EMAIL PROTECTED] wrote: Now how can I achieve, what I want? Really exchange one line with another, regardless of their length. Is this possible? If this is not possible, then what would be the best approach to do this? A file is exposed as a sequence of bytes. You can only exchange a string of bytes with the same number of (different) bytes. Inserting or removing bytes means you have to rewrite the file from the insertion/deletion point onwards. Usually you don't bother and just rewrite the whole file. Thanks to you both. I will use that. I do not think, that the files will be that large, that a database is useful. The main advantage of the file is, that it is directly human readible. Regards Marco -- http://mail.python.org/mailman/listinfo/python-list
Re: New blog
vinu wrote: Hi all, http://pyadmin.blogspot.com/ THis is my blog and This is related to python utilities for system and network administration.plz comment on this regards Vineesh Kumar The biggest problem seems to be the failure of indentation in the published code, which will make the code hard to read and impossible to copy-and-paste should anyone wish to use it. I run code through a colorizer program before publishing it (do a Google search for colorize.py) in my blog - see for example: http://holdenweb.blogspot.com/2006/04/test-driven-development.html With space indentation rather than tabs, it seems to copy-and-paste quite nicely. The only other question I have is related to your use of strings instead of comments. Where you want them to be the docstring for a function or class or method you should have them at the first line of the body, as in: def func(x): This is the first line of a multi-line docstring. The second and subsequent lines, if any, should appear indented like this. You also seem to use strings rather than comments at the end of statements. It appears these have been added after the fact, since they introduce syntax errors, as in sleeptime=15 The time to wait for getting a response from the router It's always a good idea to take published code and verify that it will indeed compile and run as published. It's so easy to make mistakes in any of the transcription steps. (Having written a book helps in this respect, as there are myriad ways that publishers can screw up perfectly good code and you learn *all* about them int he authorship process). I'm sure that there are lots of net and sys admins who would love to be able to get their hands on these simple but helpful programs, so I'd encourage you to polish up your code and keep helping to make Python more popular. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Love me, love my blog http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
Re: Time to bundle PythonWin
John Bokma wrote: Robert Hicks [EMAIL PROTECTED] wrote: No it isn't. Learn to quote when you use Google's Usenet garbage. I don't know why you consider it 'garbage', using it myself for this 'contribution', but quoting isn't hard using google groups. Just clicking the right links instead of the 'reply' link beneath the message. On-Topic: I'd welcome PythonWin added to the Python Windows MSI installer too, for purposes similar to the O-Ps. Do not possess the necessary skill to write patches, but still voting in favor. --Tim -- http://mail.python.org/mailman/listinfo/python-list
RE: simultaneous reading and writing a textfile
Why this: lines = iter(infile.readline, ) # copy one line at a time for line in lines: Rather than this? for line in infile: ..Mark This email and any attachment may contain confidential, privileged information for the sole use of the intended recipient. If you are not the intended recipient, do not disclose, reproduce, disseminate or otherwise use this communication. If you received this communication in error, please immediately notify the sender via email and delete the communication from your system. -- http://mail.python.org/mailman/listinfo/python-list
Re: Replace
Anthra Norell wrote:
se = SE.SE (r' ~=.~=\=#')
se ('tyrtrbd =ffgtyuf == =tyryr =u=p ff')
'tyrtrbd =#fgtyuf =# =#yryr =#=# ff'
I am in the final stages of documenting my stream editor SE. There are quite
a few problems raised on this list which SE would handle elegantly. Where do
I propose it for distribution?
The Cheese Shop (how I dislike that name :), otherwise known as the
Python Packahe Index, is the usual place to offer code in Python
nowadays. See
http://www.python.org/pypi
regards
Steve
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Holden Web LLC/Ltd http://www.holdenweb.com
Love me, love my blog http://holdenweb.blogspot.com
Recent Ramblings http://del.icio.us/steve.holden
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Re: Time to bundle PythonWin
Dave Benjamin wrote: Hey folks, Why is PythonWin (win32all) still a separate download from a third party? Is it legal, technical, or what? I think it's about time it be part of the standard distribution. Something that the other responders seem to have ignored is the separation of development of the two systems. If Python for Windows were to bundle win32all then there'd be less chance of Mark Hammond releasing bugfixes separately from the Python distribution, and he would have to synchronise his release cycles with those of the Python core. It can be done (witness the forthcoming introduction of elementtree as a standard library module), but I see little benefit in this case, especially as there's little evidence that the majority of Windows Python users need win32all. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Love me, love my blog http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
Re: calling upper() on a string, not working?
John Salerno a écrit : Bruno Desthuilliers wrote: def encrypt_quote(original): # Since it's here that we define that the new letters # will be uppercase only, it's our responsability # to handle any related conditions and problems # The other functions shouldn't have to even know this. original = original.upper() def filter_letters(original): # here, we *dont* have to do anything else than filtering # upper/lower case is *not* our problem. return ''.join(set(original) - PUNCT_SPACE_SET) Thanks, I was wondering if it only needed to be done in a single place like that. It's always better to do something in a single place - you may here of this as the DRY (Dont Repeat Yourself) or SPOT (Single Point Of Transformation) rule. The way you wrote it, part of encrypt_quote's responsability and knowldege was leaking into filter_letters. This is a Bad Thing(tm), and should be avoided by any mean. -- http://mail.python.org/mailman/listinfo/python-list
questions on python script compiling for embedding
Dear all, I am trying to embed python into another scripting language, to do this I need to solve a number of problems on importing or compiling python script. First let me state what exactly I want to do, that is, I want the following syntax to be supported in the host language which I am developing: ## # scripts in the host language routine Test() do println(printed by Test()); end global astring = ASTRING; # begin python scripts: @begin(python) def PyTest( s ): print s return 1000; # access global variables from the host scripts pystring = astring; # call function defined in the host script: Test(); @end(python) # call a python function: n = PyTest( invoke python function ); ## So there are the following problems come out naturally: #1. can I compile a block of python script to get the list of variables, classes and functions etc. (or at least the names) without executing? Because I need the host script to see the python definitions. The Py_CompileStringFlags() seems to do the work. But it returns a code object, which I don't know exactly and if it is possible to get the list of variables, classes and functions from this kind of object. ##2. Can I pass a list global variables for such compiling? Because I need python scripts also see the variables functions etc. defined in the host scripts. * For these two problem, a C API like this would be pefect: PyObject* Py_CompileStringFlagsXXX( const char *str, const char *file, int start, PyObject *module, PyCompilerFlags *flags ); Different from Py_CompileStringFlags(), this function should take another parameter (Python module object), which serve as a **namespace**, to solve undefined names in the souce str, and store global variables, functions and classes etc defined in this source string. So the third question is: ###3. Is there some way, or how to do such thing as Py_CompileStringFlagsXXX() would do??? Of course, I do not expect such API should be added soon or even added. Thanks a lot, Limin -- http://mail.python.org/mailman/listinfo/python-list
RE: simultaneous reading and writing a textfile
Mark Wilkinson wrote: Why this: lines = iter(infile.readline, ) # copy one line at a time for line in lines: Rather than this? for line in infile: file.next() uses an internal cache. The data in that cache would be lost when the rest of the file is copied using file.read() with for block in iter(lambda: infile.read(BLOCKSIZE), ): outfile.write(block) Demonstration: open(tmp.txt, w).write(alpha\nbeta\ngamma\n) infile = open(tmp.txt) infile.next() 'alpha\n' infile.read() '' # where is 'beta\ngamma\n'? I admit I didn't profile whether the suggested approach is an overall win over line-wise copying of the whole file or manually keeping track of the position in the file followed by a seek(). Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Ant wrote: I think Duncan has hit the nail on the head here really. I totally agree that conceptually using tabs for indentation is better than using spaces. Pragmatically though, you can't tell in an editor where spaces are used and where tabs are used. Um, I don't follow this. If you can't tell the editor where tabs/spaces are used, who does? Perhaps if editors colored the background of tab characters differently from spaces this wouldn't be a problem, Some editors do. or if Python was more restrictive and did not actually allow a mix of tabs and spaces for indentation there would be no problem - the compiler could throw out an exception for mixed characters. python -tt In reality, neither of these are likely to be implemented any time soon! um Iain -- http://mail.python.org/mailman/listinfo/python-list
how to traverse network devices in our system?
hi all, i would like to know whether python can help me querying the network devices attached to my system (ethernet,wireless) and display their module name and vendor name? thank you. regards, chakkaradeep. -- http://mail.python.org/mailman/listinfo/python-list
Strange IO Error when extracting zips to a network location
Hi, I've written a script to run on windows to extract all zips under a given directory path to another directory path as such: python extractzips.py fetch all zips under this dir put all extracted files under this dir The purpose of this script is to retrieve backup files which are individually zipped under a backup directory tree on a backup server. This scripts works nicely and has input validation etc, exiting gracefully and telling you if you gave a non existent start or target path... When running the script as follows python extractzips.py \\backupserver\backupshare\machine\folder d:\unziphere the script works perfectly, but if I do python extractzips.py \\backupserver\backupshare\machine\folder \\anetworkmachine\share\folder then it unzips a lot of files, recreating the directory tree as it goes but eventually fails with the traceback: File extractzips.py, line 41, in zipextract outfile.write(zip.read(x)) IOError: [Errno 22] Invalid argument But I'm sure the code is correct and the argument is passed properly, otherwise a hundred files before it wouldn't have extracted successfully using this exact same piece of code (it loops over it). It always fails on this same file every time. When I extract the same tree to my local drive it works fine without error. I have no idea why pushing to a network share causes an IO Error, shouldn't it be the same as extracting locally from our perspective? It pulls fine, why doesn't it push fine? Thanks for any help or suggestions anybody can give me. Hari -- http://mail.python.org/mailman/listinfo/python-list
Re: [silly] Does the python mascot have a name ?
Steve wrote: umm, was just wondering, does the python mascot have a name ? We are naming the conference rooms in our office you see :o). Also, is there a place I could get some neat, good quality pics of the python ? - steve The Python mascot is called Odi. http://mail.python.org/pipermail/python-list/2003-September/185612.html -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Tabs are evil, end of discussion. (Re: Tabs versus Spaces in Source Code)
Harry George wrote: This has been discussed repeatedly, and the answer is If you only work alone, never use anyone else's code and no one ever uses your codes, then do as you please. Otherwise use tab-is-4-spaces. When you do Agile Programming with people using emacs, vim, nedit, xedit, wordpad, eclipse, and who knows what else, the 4-spaces rule is necessary for survival. The reason is simple: People get confused, and accidentally get the wrong tab indents when they move among editors or among settings on the same editor. In most languages this is an irritation, requiring some cleanup. In Python it is a disaster requiring re-inventing the coded algorithms. 1. Tabs as 8 spaces just take up way too much horizontal space, so you can't use 8-space tabs... 2. BUT... you can't use any other value (not even 4)... !! WHY?? Because if you do, you will screw up display using /something as basic as cat, less, more (and many other unix utilities where the historical assumption that tabs are 8 spaces is hardcoded)! DOES ANYONE NEED ANY REASON MORE COMPLICATED THAN THE ABOVE TO JUST *NOT* USE TABS?? Yet ANOTHER proof that tabs are evil: 3. If tabs weren't around, we wouldn't have all these time-wasting threads on tabs vs. spaces, or on how many spaces a tab should represent. Tabs were an unnecessary Rube Goldberg invention misguidedly carried over from the typewriter era. They are the appendix of text editors. Just because they're there doesn't necessarily mean they serve any (even remotely) useful purpose. -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: A Unicode problem -HELP
Hi Martin, Thanks very much. Your def comma_separated_utf8(items): approach raises an exception in codecs.py, so I tried = u, .join(word_info + parse + gloss), which works perfectly. So I want to understand exactly why this works. word_info and parse and gloss are all tuples. does str convert the three into an ascii string? but the join method retains their unicode status. In the text file, the unicode characters appear perfectly, so I'm very happy. cheers matthew -- http://mail.python.org/mailman/listinfo/python-list
RE: How to pass variables between scripts?
Marcelo, thank you very much for your help!!! The script is running nicely
now and I can pass the variables easily between the scripts.
If someone else followed this topic ... a short note at the end.
It seems that with the 'globvars' also the modules used by 'second.py' have
to be passed. Somehow the modules defined in 'second.py' itself are not
available when 'second.py' is called from an external script. So adding
following line to the external script solves the problem:
globvars = { 'os' : __import__('os') }
Many thanks again,
Dorit
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
On Behalf Of Marcelo Ramos
Sent: 16 May 2006 19:51
To: python-list@python.org
Subject: Re: How to pass variables between scripts?
Gross, Dorit (SDRN) escribió:
#! /usr/local/bin/python
# test_exec.py
import os, sys, glob
fileList = glob.glob('/data/*.ZIP')
for f in fileList:
try:
globvars = {'infile' : f}
locvars = {}
execfile('/scripts/second.py', globvars(), locvars)
except IOError:
exit(0)
print locvars
You are calling the dictionary globvars as a function then
the error.
The fixed line is:
execfile('/scripts/second.py', globvars, locvars)
What you want is the function globals().
Try putting this line in second.py:
print globals()['infile']
Using the dictionary returned by globals() you can make
second.py to
read the contents of testexec.py's globvars dictionary.
locvars is populated with the local variables of second.py
and that is
what you want.
Marcelo, thank you! Passing the variables with dictonaries and
function
globals() works fine if no other functions are defined in
'second.py'. Now
'second.py' contains further functions and a if __name__ =
__main__
statement and in this case it seems that 'second.py' is not
fully executed
from 'test_exec.py'. For the sole purpose of testing,
'second.py' looks like
this at the moment:
#! /usr/local/bin/python
# second.py
import os, sys
global zipfile
print 'Read from globals: ' + globals()['infile']
zipfile = globals()['infile']
print 'Read from zipfile: ' + zipfile
if __name__ == '__main__':
print 'Hello'
print globals()['infile']
print zipfile
Calling test_exec.py results into this output:
./test_exec.py
Read from globals: /data/S0012230_0010.ZIP
Read from zipfile: /data/S0012230_0010.ZIP
It seems that the commands within the main are not executed when
calling test_exec.py!?! Is there a way to make it running?
Regards and thank you again,
Dorit
If you print __name__ in second.py its value is
'__builtin__', because
of that your main doesn't execute.
Try adding this to test_exec.py before the execfile() call:
globvars[ '__name__' ] = '__main__'
It looks like a ad hoc fix but i couldn't find any doc about
the change
of __name__ to 'builtin' of a python script being run
from another with execfile().
Regards.
--
Marcelo Ramos
Fedora Core 5 | 2.6.16
Socio UYLUG Nro 125
--
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Tabs are *EVIL*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Please... just stop this senseless defense of a Rube-Goldberg feature. There will NEVER be a universal agreement on whether tabs should be 2, 3, 4 or 8 spaces in width, and this causes endless tweaking of editor settings (a *humongous* waste of time) to handle source code made by other programmers with different settings. And I, for the life of me, have never remembered getting any source code to display properly by fiddling with my text editor's (the very popular SciTE) tab settings. 4, 8, 3, 2, it doesn't matter. *Nothing* has ever made someone's tab-infested source code display completely cleanly. Nearly a third of my coding time seems to have been spent (read:wasted) trying to reformat some unenlightened tab user's source code to read comprehensibly. 1. Tabs as 8 spaces just take up too much horizontal area 2. But you can't use any other value because if you do, you will screw up display using cat/less/more !! DOES ANYONE NEED ANY REASON MORE COMPLICATED THAN THE ABOVE TO JUST *NOT* USE TABS??!???!??!!!?? Don't be evil - always configure your editor to convert tabs to true spaces. -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python script windows servcie
Mivabe formulated the question : Google helped me discovering that it has something to do something with 'CTRL_LOGOFF_EVENT'. I know what it means but i don't know how to solve it. Is that something i have to configure in the script? I'n totally new to Python so maybe someone can point me to the right direction? :D Regards, Mivabe No-one who can help me or did i visit the wrong group for this 'problem'? -- No line here today Posted by news://news.nb.nu -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework to recommend (don't use one, use Spyce instead)
Jacky wrote: Hi all, I just started learning Python and would like to starting writing some web-based applications with Python. I did have pretty much experience with doing so with PHP and Java, but Python seems a bit different for me. Do you guys have some good web framework to recommend? (I don't want to use CGI mode) Thanks a lot. -- Jacky Spyce is probably the most underappreciated Python web solution out there. If you don't want the hassle of a framework's learning curve, Spyce lets you do PHP/JSP/ASP style coding using what you already know about Python and not much else. It is also more powerful than PHP because it supports features such as custom tags (ala JSP) and others. Check out the Wikipedia article below: http://en.wikipedia.org/wiki/Spyce The important thing to note is that you can transparently use traditional ASP, JSP style angled brackets % and % and not the confusing [[, ]] that Spyce documentation defaults to. I believe this is what may have turned many people (who are not aware of the more standard alternative) off from using Spyce. I however, disagree with the assertion in the wikipedia article that Spyce is easier to set up than PHP... PHP is just as easy to set up as Spyce, if not easier... -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
RE: Python script windows servcie
[Mivabe] | Mivabe formulated the question : | | Google helped me discovering that it has something to do | something with | 'CTRL_LOGOFF_EVENT'. I know what it means but i don't know | how to solve it. | Is that something i have to configure in the script? | | I'n totally new to Python so maybe someone can point me to | the right | direction? :D | | Regards, Mivabe | | No-one who can help me or did i visit the wrong group for this | 'problem'? I did start to formulate a reply of sorts, but got distracted. In short what you seem to be saying is: You have a python script (which happens to attach to a Jabber server, but that's really immaterial) and you've used SRVANY / INSTSRV to run it as a service, but then it stops running when something happens. It's not clear how the Remote Desktop part of things comes in -- are you installing the service when logged on a via RD? Or are you running Wildfire via RD? Whichever way round it is, the fact that it is a Python script doesn't seem terribly relevant. It sounds like its an issue to do with running something as a service via SRVANY and logging off a Remote Desktop session. This is not to be unfriendly -- I hope someone here can help -- but your description was sufficiently vague that I imagine many people -- like me -- couldn't quite work out what was happening, and so couldn't really help. TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Iain King wrote: python -tt Indeed. I reckon the consensus here (to the extent that there is any!) is that it would be better if this was Python's default behaviour. The argument (not advanced by Iain but by others in this thread) that: novices will mix tabs and spaces = we should all use spaces only is clearly false by symmetry. An alternative solution to this issue would be to write an editor plugin which converted between space-indented and tab-indented Python source files on opening *and back again* on writing or closing. Then we would have: Case 1: you send me a space-indented file. My editor opens the file, finds that it is space-indented, calculates the indentation level of each line and converts it to the corresponding number of tabs, and then writes that to a temporary file which it then displays for editing. On writing, it converts indentation back to spaces and writes to the original file. Case 2: I send you a tab-indented file. As Case 1 with s/tab/space/; s/My/Your/ Case 3: You send me a file with mixed tab/space indentation Everything borks, as it should. It's horrible but at least it would insulate me from the greater hideousness of having to hit the spacebar like a madman at the start of every line of code. I can even see how to get it to work in vi at least. Just trying to be constructive! Not that it's relevant, but I've never actually encountered anyone who mixed tabs and spaces.. I've lived a sheltered life I guess. -- http://mail.python.org/mailman/listinfo/python-list
RE: how to traverse network devices in our system?
[EMAIL PROTECTED] | i would like to know whether python can help me querying the network | devices attached to my system (ethernet,wireless) and display their | module name and vendor name? Which OS? If it's windows, you can use WMI. I would guess Linux, tho', from your mention of module name. TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *EVIL*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Andy Sy wrote: Don't be evil - always configure your editor to convert tabs to true spaces. Yet another space-indenter demonstrates that problem actually lies with people who think that tab == some spaces. And I, for the life of me, have never remembered getting any source code to display properly by fiddling with my text editor's (the very popular SciTE) tab settings. Sorry to hear that. You should try using an editor that's easier for you. By the way, complaining about a thread's existence is pretty dumb. If you don't like it, don't post to it. Or are you unable to operate your news reader either? -- http://mail.python.org/mailman/listinfo/python-list
Re: how to traverse network devices in our system?
Hi Tim and all, Tim Golden wrote: [EMAIL PROTECTED] | i would like to know whether python can help me querying the network | devices attached to my system (ethernet,wireless) and display their | module name and vendor name? Which OS? If it's windows, you can use WMI. I would guess Linux, tho', from your mention of module name. Yes, it is Linux. I was just googling and found that there are kudzu bindings for python. From that i can query kudzu for any configured and unconfigured device (i hope so). is there any other method available other kudzu python bindings ? thank you. Chakkaradeep TJG This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk -- http://mail.python.org/mailman/listinfo/python-list
index in for loops
in for loops like the following: word='abcade' for letter in word: print letter Is it possible to get the position of letter for any iteration through the loop? so for examlpe letter=='a', and I want to know if it is the first or second 'a' in 'abcade'. can i do this by looking at a property of letter? -- http://mail.python.org/mailman/listinfo/python-list
Re: index in for loops
manstey wrote: in for loops like the following: word='abcade' for letter in word: print letter Is it possible to get the position of letter for any iteration through the loop? for index, letter in enumerate(word): print index, letter -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Ant wrote: spaces. Pragmatically though, you can't tell in an editor where spaces are used and where tabs are used. Um, I don't follow this. If you can't tell the editor where tabs/spaces are used, who does? Re-read my post. Note the key word 'in'. Perhaps if editors colored the background of tab characters differently from spaces this wouldn't be a problem, Some editors do. Some isn't nearly good enough to solve the problem. python -tt Not the default behaviour, and so not good enough for tabs to be a good indent character. In reality, neither of these are likely to be implemented any time soon! um OK. Widely implemented and default behaviour. Your points are fine if you are working by yourself (hell you could use Perl and it wouldn't matter ;-) ), but in for example an open source project where work is distributed over developers working in vastly different environments, tabs currently aren't a workable option. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Not that it's relevant, but I've never actually encountered anyone who mixed tabs and spaces.. I've lived a sheltered life I guess. It's not individuals using a mixture, but when working in a development team of some kind. Consider person A who writes a file using spaces for indent. Person B then edits that file, adding a few lines of code, indenting using tabs. It could soon get messy! -- http://mail.python.org/mailman/listinfo/python-list
Re: CFLAGS are not taken into account properly
Toon To configure python on a Solaris 9 box with sunstudio11 installed Toon and to compile it in 64bit, I execute following: Toon code Toon export CC=cc Toon export CFLAGS=-xarch=v9 Toon export CXX=CC Toon export CXXFLAGS=-xarch=v9 Toon export F77=f77 Toon export FFLAGS=-xarch=v9 Toon export LDFLAGS=-xarch=v9 Toon ./configure Toon /code Toon When doing 'make' afterwards, the '-xarch=v9' option is not on the Toon command-line however? Should'nt the CFLAGS be propagated to the Toon Makefile that is generated by configure? Or is there any other way Toon to do this? I agree, the Python configure/Makefile combination doesn't conform very well to current GNU style in this regard. Try setting EXTRA_CFLAGS instead of CFLAGS. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: arrays, even, roundup, odd round down ?
Lance Hoffmeyer wrote:
So, I have using the following to grab numbers from MS Word. I discovered
that that there is a special
rule being used for rounding.
If a ??.5 is even the number is to rounded down (20.5 = 20)
if a ??.5 is odd the number is to rounded up (21.5 = 22)
Brands = [B1,B2]
A1 = []
A1 = [ re.search(r(?m)(?s)\r%s.*?SECOND.*?(?:(\d{1,3}\.\d)\s+){2} % i,
target_table).group(1) for i in Brands ]
A1 = [int(float(str(x))+0.5) for x in A1 ]
print A1
Any solutions for this line with the above conditions?
Seems like a job for Decimal:
from decimal import Decimal
numbers = 20.50 21.5.split()
ZERO_PLACES = Decimal(1)
print [int(Decimal(num).quantize(ZERO_PLACES)) for num in numbers]
produces
[20, 22]
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Re: Strange IO Error when extracting zips to a network location
Hari Sekhon wrote: Hi, I've written a script to run on windows to extract all zips under a given directory path to another directory path as such: python extractzips.py fetch all zips under this dir put all extracted files under this dir The purpose of this script is to retrieve backup files which are individually zipped under a backup directory tree on a backup server. This scripts works nicely and has input validation etc, exiting gracefully and telling you if you gave a non existent start or target path... When running the script as follows python extractzips.py \\backupserver\backupshare\machine\folder d:\unziphere the script works perfectly, but if I do python extractzips.py \\backupserver\backupshare\machine\folder \\anetworkmachine\share\folder then it unzips a lot of files, recreating the directory tree as it goes but eventually fails with the traceback: File extractzips.py, line 41, in zipextract outfile.write(zip.read(x)) IOError: [Errno 22] Invalid argument But I'm sure the code is correct and the argument is passed properly, otherwise a hundred files before it wouldn't have extracted successfully using this exact same piece of code (it loops over it). It always fails on this same file every time. When I extract the same tree to my local drive it works fine without error. I have no idea why pushing to a network share causes an IO Error, shouldn't it be the same as extracting locally from our perspective? It looks like http://support.microsoft.com/default.aspx?scid=kb;en-us;899149 is the answer. -- http://mail.python.org/mailman/listinfo/python-list
Re: IDLE confusion
This isn't really an IDLE issue, it's a Python feature which needs to be understood. In Python, once you've imported a module once, importing it again is ignored. This works fine under the assumption that modules don't change during a single Python session. However, when you're developing a module this isn't true, and a workaround for this mechanism is needed. The safest way to go is to start a new Python session. In the IDLE interpreter (Shell window) you can do this from the Shell menu. Running a module from an IDLE editor window (Run-Run Module) will also restart the interpreter. Notice, however, that these will only work if IDLE has a sub-process for the interpreter! If not, the Shell menu won't exist, and Run Module won't restart the interpreter. On Windows, opening IDLE by right-clicking a file and choosing 'Edit with IDLE' will cause it to open without a subprocess. If you change a module and want to use the newer version in the same Python session, use the built-in 'reload' function: import Test reload(Test) Notice that if you use the 'from module import ...' syntax, you need to import the module itself (i.e. import module) before you can reload it. I advise to use this with care, as things can get quite confusing after a few reloads... -- http://mail.python.org/mailman/listinfo/python-list
Re: Python script windows servcie
Mivabe wrote: Mivabe formulated the question : Google helped me discovering that it has something to do something with 'CTRL_LOGOFF_EVENT'. I know what it means but i don't know how to solve it. Is that something i have to configure in the script? I'n totally new to Python so maybe someone can point me to the right direction? :D Regards, Mivabe No-one who can help me or did i visit the wrong group for this 'problem'? Indeed. Next time you'd better ask in a windows specific list: http://mail.python.org/mailman/listinfo/python-win32 You need to ignore CTRL_LOGOFF_EVENT. Take a look for example at http://mail.zope.org/pipermail/zope-checkins/2005-March/029068.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Using python for a CAD program
On 17-May-06, at 6:33 AM, comp.lang.python group wrote: I'd like my program to *look* slick, like it belongs in a movie or something. I think that means starting from scratch, since I've not seen any CAD program take any artistic/human/psychological approach to its design. That *is* true - the problem with CAD programs are that they need the *exact* details to be entered at design time so one cannot easily schetch in them and fix the design errors later. Not universally true, and here's a niche for you Andreas: Most 2D cad requires that you enter ALL design information as you go. You can't, for instance, draw a line at 30degrees to another line and then change the second without having to redraw the first. Sketchers from 3D cad programs (like Solidworks, Inventor, Solid Edge, Pro/Engineer) are more like geometry solvers - by putting in a dimension, you say line a is always 30 degrees to line b.Now when you change the angle of line b, line a changes too! In this way, you can sketch out the SHAPE of your drawing, and worry about the DIMENSIONS later. You can't imagine how useful this is. Now that I've switched to Solidworks, my drafting speed has doubled. I haven't seen anyone make a 2D cad package with this behaviour. I'm sure there's a market for one if you go that route. -Brendan -- http://mail.python.org/mailman/listinfo/python-list
Re: Option parser question - reading options from file as well as command line
Tim N. van der Leeuw wrote:
Andrew Robert wrote:
Hi Everyone.
I tried the following to get input into optionparser from either a file
or command line.
The code below detects the passed file argument and prints the file
contents but the individual swithces do not get passed to option parser.
After reading your post I decided to play around with optparse a bit,
to get acquainted with it.
Experimenting with IDLE I found that the Values object returned by
parse_args has a method 'readfile', and this 'readfile' method allows
you to add options to the Values object.
The syntax should be in the form:
option=value
option should not include the hyphens -- if your option is added as
'-x', then you should write:
x=3
not:
-x=3
If you have options with both long names and short names, then you
should use the long name -- if your option is added as '-f', '--file',
then you should write:
file=foo.txt
not:
f=foo.txt
Also, you need the assignment-operator in your file.
I didn't find any documentation on this, and I didn't try this with any
actions; only with options added to the parser like
op.add_option('-x', dest='x')
Using this 2-step approach allows you to use optparse itself to get to
the command-line option with your command-line settings...
Out of pure personal interest, what queuing-system are you writing to
from Python? What libraries do you have for that? And is it commercial
software, or freely downloadable?
(I'd love to be able to write messages to IBM MQ Series from Python)
Cheers,
--Tim
Hi Tim,
I am using the pymqi module which is freely available at
http://pymqi.sourceforge.net/ .
Documentation on the module can be found at
http://pymqi.sourceforge.net/pymqidoc.html .
I have a few python examples on my web site located at
http://home.townisp.com/~arobert/
There are also a lot of good examples at
http://www.koders.com/info.aspx?c=ProjectInfopid=TVM5FGBZMY4E5ZH7GC9AX54PAC
.
If you come up with anything, I would be glad to see what you have.
Back to the original issue:
I'm not sure exactly what you mean about the readfile option and format.
Could you send me a code snippet so I can get a better feel for it?
Thanks,
Andy
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Re: Tabs versus Spaces in Source Code
achates wrote: It's horrible but at least it would insulate me from the greater hideousness of having to hit the spacebar like a madman at the start of every line of code. I can even see how to get it to work in vi at least. Hitting the spacebar like a madman? If you have a sensible editor then at the start of a line you press tab once for each additional level of indentation and backspace once for each fewer level and neither if the indentation is guessed correctly by the editor. in another post you suggested to someone else: Sorry to hear that. You should try using an editor that's easier for you. -- http://mail.python.org/mailman/listinfo/python-list
Re: common practice for creating utility functions?
Edward Elliott wrote:
Bruno Desthuilliers wrote:
Then it would be better to just alias it:
# def convert_quote(quote):
# return make_code(quote)
convert_quote = make_code
The former makes sense if you're planning to do more with the calling
function later.
Then it will be time to uncomment the def block and comment out the
binding !-)
About the fine to do part, remember that Python's function calls are
rather expansive...
Indeed, their expansiveness makes them great. Unfortunately they're
somewhat expensive too. ;)
Lol !-)
Please have mercy, I learned English a long long time ago - and mostly
with the lyrics of my favorite rock bands...
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: assignment in a for loop
MackS wrote:
(snip)
What's preventing the use of list comprehensions?
new_list = [x+1 for x in old_list]
Suppose I want to do anything as trivial as modify the values of the
list members _and_ print their new values.
Then it's a sure design smell IMHO. Don't mix presentation with logic.
List comprehensions must not
contain statements, I think.
You're right.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: Tabs are *MISUNDERSTOOD*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Andy Sy wrote: Don't be evil - always configure your editor to convert tabs to true spaces. achates [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Yet another space-indenter demonstrates that problem actually lies with people who think that tab == some spaces. Exactly. Cheers, Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Hitting the spacebar like a madman? If you have a sensible editor then at the start of a line you press tab once True! but normally if I'm editing someone else's code then I'm only making small changes and so can't be bothered to temporarily cripple my editor. If I'm merging my code with someone else's space-indented code then piping through sed 's/TAB/SPACES' does the trick. -- http://mail.python.org/mailman/listinfo/python-list
Re: Help System For Python Applications
BartlebyScrivener wrote:
At the commandline, run:
pydoc -g
In the interpreter:
help(modulename)
or help ()
for interactive.
This is developper doc. I think the OP's talking about end-user doc.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: Tabs versus Spaces in Source Code
achates enlightened us with: True! but normally if I'm editing someone else's code then I'm only making small changes and so can't be bothered to temporarily cripple my editor. If I'm merging my code with someone else's space-indented code then piping through sed 's/TAB/SPACES' does the trick. I just type 'retab' in my editor, and everything is fine. I use VIM, which is great for tab/space management. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: round numbers in an array without importing Numeric or Math? - SOLVED, sort of
Paul McGuire [EMAIL PROTECTED] writes: ... or if you prefer the functional approach (using map)... roundToInt = lambda z : int(z+0.5) Topamax = map( roundToInt, map( float, map(str, Topamax) ) ) (Python also has a built-in round() function, but this returns floats, not ints - if that is okay, then just delete the lambda definition, and replace roundToInt with round.) Your roundToInt behaves differently from round for negative numbers: roundToInt(-0.6) 0 int(round(-0.6)) -1 Bernhard -- Intevation GmbH http://intevation.de/ Skencil http://skencil.org/ Thuban http://thuban.intevation.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange IO Error when extracting zips to a network location
I put a try-pass around the line outfile.write(zip.read(x)) so that everything extracts regardless. After extraction I checked the file size of every single file in the directory tree and only 2 files on the network drive are of different size to the ones extracted locally. Both these files are .dbf files that are over 100MB when extracted. Both of them is short by exactly 4 KB. Strange. I wonder if I'm hitting a size limit or something with this zipfile module, or perhaps a python limitation on buffer or something? I've change the code to contents=zip.read(x) outfile.write(contents) but I still get the same result. -h Hari Sekhon wrote: Hi, I've written a script to run on windows to extract all zips under a given directory path to another directory path as such: python extractzips.py fetch all zips under this dir put all extracted files under this dir The purpose of this script is to retrieve backup files which are individually zipped under a backup directory tree on a backup server. This scripts works nicely and has input validation etc, exiting gracefully and telling you if you gave a non existent start or target path... When running the script as follows python extractzips.py \\backupserver\backupshare\machine\folder d:\unziphere the script works perfectly, but if I do python extractzips.py \\backupserver\backupshare\machine\folder \\anetworkmachine\share\folder then it unzips a lot of files, recreating the directory tree as it goes but eventually fails with the traceback: File extractzips.py, line 41, in zipextract outfile.write(zip.read(x)) IOError: [Errno 22] Invalid argument But I'm sure the code is correct and the argument is passed properly, otherwise a hundred files before it wouldn't have extracted successfully using this exact same piece of code (it loops over it). It always fails on this same file every time. When I extract the same tree to my local drive it works fine without error. I have no idea why pushing to a network share causes an IO Error, shouldn't it be the same as extracting locally from our perspective? It pulls fine, why doesn't it push fine? Thanks for any help or suggestions anybody can give me. Hari -- http://mail.python.org/mailman/listinfo/python-list
Re: CFLAGS are not taken into account properly
[EMAIL PROTECTED] wrote: I agree, the Python configure/Makefile combination doesn't conform very well to current GNU style in this regard. Try setting EXTRA_CFLAGS instead of CFLAGS. Thanks. But some other (but 'similar') functionality is broken. Now I succeeded in compiling python. But when using distutils (e.g. when installing numarray using the setup.py), python will compile the files using the '-xarch=v9' option but drops this option when linking dynamic libraries (although I defined LDFLAGS=-xarch=v9 before configuring python). Additionally python adds the option '-xcode=pic32' to the compile-command which will compile my numarray in 32bit instead of 64bit (while python itself is in 64bit) toon -- http://mail.python.org/mailman/listinfo/python-list
Re: Option parser question - reading options from file as well as command line
Andrew Robert wrote:
Tim N. van der Leeuw wrote:
Andrew Robert wrote:
[...]
Hi Tim,
I am using the pymqi module which is freely available at
http://pymqi.sourceforge.net/ .
Documentation on the module can be found at
http://pymqi.sourceforge.net/pymqidoc.html .
I have a few python examples on my web site located at
http://home.townisp.com/~arobert/
There are also a lot of good examples at
http://www.koders.com/info.aspx?c=ProjectInfopid=TVM5FGBZMY4E5ZH7GC9AX54PAC
.
If you come up with anything, I would be glad to see what you have.
Thanks a lot for these examples! I have some Java tools that send MQ
messages (reading, in fact, a ton of command-line arguments from a
file) and I need better tools. If I could use some Python for rewriting
this, it might speed me up a lot.
Back to the original issue:
I'm not sure exactly what you mean about the readfile option and format.
Could you send me a code snippet so I can get a better feel for it?
Thanks,
Andy
Here's the file I used:
===cut here===
x=4
w=6
what=7
zoo=9
===cut here===
Here's some snippets of code:
from optparse import OptionParser
op = OptionParser()
op.add_option('-x', dest='x')
op.add_option('--what', '-w', dest='what')
v=op.parse_args()[0]
v.read_file('options-test.txt')
v
Values at 0x12a9c88: {'x': 4, 'what': 7}
As you can see, I'm parsing an empty command-line but I could parse a
full command-line as well before loading options from file.
After parsing the command-line, I get an instance of a 'Values' object,
and on this object I call a method 'read_file' with a filename. (I
could also call 'read_module', and it will add the __doc__ string).
I didn't test what happens with a more advanced useage of OptionParser
options.
Cheers,
--Tim
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Re: problem with namespaces using eval and exec
Thanks a lot, that works for me. -- http://mail.python.org/mailman/listinfo/python-list
Re: Unable to extract Python source code using Windows
I'd blame WinZip for claiming rights to files it can't read You are probably right ... however in Windows Explorer on my box, .bz2 files have an I don't know type of icon, whereas .zip (of course(?)) and .tgz and.tar.gz files have the WinZip vice-squeezing icon. Are there two different lists of what exe handles what extension?? Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: A better way of making subsclassing of built-in types stick for attributes?
Thanks. Ben Finney wrote: [EMAIL PROTECTED] [EMAIL PROTECTED] writes: Of course, whenever you then set mystr = 'a string' ... you're instantiating a 'str' object, since that's what the syntax you use will do. you loose the extra goodies that I have attached in the subclass. Because you haven't created an object of that subclass. naturally. The syntax used to make the object assigned to 'foo' is just a shortcut for the syntax used to assign to 'bar'. If you want to instantiate anything else, you need to use that explicit syntax, such as for the object assigned to 'baz'. If you're hoping that subclass means modify the behaviour of the original class, you're mistaken. It makes a *new* class that has behaviour *inherited from* the original class. Nah. I was hoping that I hadn't muffed the implementation and there was a more Pythonic way of doing what I wanted. Sounds like I've gotten things mostly right from the get go. which is reassuring for a newbie. using __set__ is the correct way to hide the vectoring to the __new__ assignment... no further shortcuts. thanks again t4 -- http://mail.python.org/mailman/listinfo/python-list
SWIG: name 'new_doubleArray' is not defined
Hello,
I am trying to use SWIG (1.3) to wrap some C code in Python (2.3.5)
under Linux, but obviously I am missing something with arrays.
This is my example.c file:
double sum_array(double x[], int size) {
int i;
double sum = 0.0;
for (i=0; isize; i++) {
sum += x[i];
}
return sum;
}
This is example.i:
%module example
%include carrays.i
%array_functions(double, doubleArray);
%{
extern double sum_array(double x[], int size);
%}
extern double sum_array(double x[], int size);
These three command seem to work fine:
swig -python example.i
gcc -fPIC -c example.c example_wrap.c -I/usr/include/python2.3
ld -shared example.o example_wrap.o -o _example.so
In python, I can import the module:
import example
But this fails:
a = new_doubleArray(10)
Traceback (most recent call last):
File stdin, line 1, in ?
NameError: name 'new_doubleArray' is not defined
What am I doing wrong ?
Thanks for your help.
alex
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Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
If tabs are easily misunderstood, then they are a MISfeature and they need to be removed. From the Zen of Python: Explicit is better than implicit... In the face of ambiguity, refuse the temptation to guess... Special cases aren't special enough to break the rules... -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: Large Dictionaries
Klaas wrote:
22.2s 20m25s[3]
20m to insert 1m keys? You are doing something wrong.
Hi Mike.
I've put together some simplified test code, but the bsddb
module gives 11m for 1M keys:
Number generator test for 100 number ranges
with a maximum of 3 wildcard digits.
Wed May 17 22:18:17 2006 dictionary population started
Wed May 17 22:18:26 2006 dictionary population stopped, duration 8.6s
Wed May 17 22:18:27 2006 StorageBerkeleyDB population started
Wed May 17 22:29:32 2006 StorageBerkeleyDB population stopped, duration 665.6s
Wed May 17 22:29:33 2006 StorageSQLite population started
Wed May 17 22:30:38 2006 StorageSQLite population stopped, duration 65.5s
test code is attached.
With bdb's it is crucial to insert keys in bytestring-sorted order.
For the bsddb test, I'm using a plain string. (The module docs list a
string being the only datatype supported for both keys values).
Also, be sure to give it a decent amount of cache.
The bsddb.hashopen() factory seems to have a bug in this regard; if you
supply a cachesize argument, then it barfs:
...
File bsddb-test.py, line 67, in runtest
db = bsddb.hashopen(None, flag='c', cachesize=8192)
File /usr/lib/python2.4/bsddb/__init__.py, line 288, in hashopen
if cachesize is not None: d.set_cachesize(0, cachesize)
bsddb._db.DBInvalidArgError: (22, 'Invalid argument -- DB-set_cachesize: method not permitted when environment
specified')
I'll file a bug report on this if it isn't already fixed.
Cheers,
Chris
import bsddb
import random
import time
import sqlite
import psyco
psyco.full()
class WallClockTimer(object):
'''Simple timer for measuring tests.'''
def __init__(self, msg):
self.start = time.time()
self.msg = msg
print time.ctime(self.start), self.msg, 'started'
def stop(self):
end = time.time()
duration = end - self.start
print time.ctime(end), self.msg, 'stopped, duration %.1fs' % duration
class NumberGen(object):
'''Phone number generator for testing different methods of storage.'''
def __init__(self, range_start, range_end, n, max_wildcards):
print '''Number generator test for %d number ranges
with a maximum of %d wildcard digits.''' % (n, max_wildcards)
wildcards = range(0, max_wildcards + 1)
# generate n unique numbers and store as keys in number_hash
timer = WallClockTimer('dictionary population')
self.number_hash = {}
for i in xrange(0, n):
unique = False
while not unique:
wildcard_digits = self.gen_wildcard_digits(wildcards)
num = self.gen_number(range_start, range_end)
if wildcard_digits 0:
num /= (10 ** wildcard_digits)
key = (num, wildcard_digits)
if self.number_hash.has_key(key):
unique = False
else:
unique = True
self.number_hash[key] = None
timer.stop()
def gen_wildcard_digits(self, wildcards):
return random.choice(wildcards)
def gen_number(self, start, end):
return int(random.uniform(start, end))
def storage_test(self, StorageTestClass):
test = StorageTestClass(self.number_hash)
class StorageTest(object):
'''base class for testing storage. Derive a test
class and provide your own runtest() method.'''
def __init__(self, number_hash):
timer = WallClockTimer('%s population' % type(self).__name__)
self.runtest(number_hash)
timer.stop()
class StorageBerkeleyDB(StorageTest):
def runtest(self, number_hash):
db = bsddb.hashopen(None, flag='c', cachesize=8192)
for (num, wildcard_digits) in number_hash.keys():
key = '%d:%d' % (num, wildcard_digits)
db[key] = None
db.close()
class StorageSQLite(StorageTest):
def runtest(self, number_hash):
db = sqlite.connect(':memory:')
cursor = db.cursor()
cursor.execute('CREATE TABLE numbers (num INTEGER, wd INTEGER)')
q = insert into numbers (num, wd) values (%d, %d)
for (num, wildcard_digits) in number_hash.keys():
cursor.execute(q, num, wildcard_digits)
db.commit()
db.close()
if __name__ == '__main__':
test_vals = {'range_start' : 61880 * 10 ** 7,
'range_end' : 61891 * 10 ** 7,
'n' : 1 * 10 ** 4,
'max_wildcards' : 3}
ngen = NumberGen(test_vals['range_start'], test_vals['range_end'],
test_vals['n'], test_vals['max_wildcards'])
ngen.storage_test(StorageBerkeleyDB)
ngen.storage_test(StorageSQLite)
--
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Re: Tabs are EVIL *and* STUPID, end of discussion. (Re: Tabs versus Spaces in Source Code)
achates wrote: Andy Sy wrote: Don't be evil - always configure your editor to convert tabs to true spaces. Yet another space-indenter demonstrates that problem actually lies with people who think that tab == some spaces. Wrong. I am completely aware that an editor configured to convert tabs to true spaces will not always replace a tab into the same number of space characters. If you understood what I meant you'd realize that it meant: Use the tab key if you have to (4,8,3,2... whatever...), but /always/ have your editor convert them to true spaces, so they can display properly - *without need for tweaks* - on any display medium and on anyone's program. The fact that a tab character doesn't necessarily equal a constant spaces is what makes things EVEN MORE CONFUSING. Cheez... some people just love complexity for its own sake... What earthly benefit is there anyway to mixing tabs and spaces??!? Now... if you say you SHOULDN'T mix tabs and spaces (indeed this is generally regarded as a BAD idea esp. in Python code), then WHAT THE HECK do you need to use tab characters in the source code for anyway (besides saving a measly few bytes) ??!? Tab characters are EVIL *AND* STUPID. Sorry to hear that. You should try using an editor that's easier for you. I am *most certainly* NOT giving SciTE up... I've spent years and years looking for the perfect editor, and I've found it with SciTE. Scite and all its cool features are NOT the problem. One single thing is: Tab characters in source code popping up like so many unsightly zits. -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: If tabs are easily misunderstood, then they are a MISfeature and they need to be removed. I don't seem to understand your point in acting as a dictator. Therefore, you are a MISfeature and need to be removed. -- # p.d. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
achates wrote: Hitting the spacebar like a madman? If you have a sensible editor then at the start of a line you press tab once True! but normally if I'm editing someone else's code then I'm only making small changes and so can't be bothered to temporarily cripple my editor. If I'm merging my code with someone else's space-indented code then piping through sed 's/TAB/SPACES' does the trick. Emacs guess what's used in the file and allows me to use tabs all the time, doing the correct thing... Personally, I like using spaces, but I don't have problems with files using tabs... -- Jorge Godoy [EMAIL PROTECTED] Quidquid latine dictum sit, altum sonatur. - Qualquer coisa dita em latim soa profundo. - Anything said in Latin sounds smart. -- http://mail.python.org/mailman/listinfo/python-list
Re: IDLE confusion
Terry Reedy a écrit : Christophe [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Try in the IDLE menu [Shell] Restart Shell (Ctrl+F6) each time you have changed something in your files - this resets anything previously imported, which stays the same way otherwise. And I though that bug was fixed already :) On my system, the current 2.4.3 version of Python+IDLE *does* auto restart with each run (F5). So either the OP is using a much older version (did not specify) or the respondant mis-diagnosed the problem. I was looking at some idlefork info not long ago and I found something which might get those different behaviours with a recent version of idle : if idle cannot open it's RPC socket, it'll execute all python code in it's own interpreter. There's an option for that in fact. -- http://mail.python.org/mailman/listinfo/python-list
using wxPython events inside a loop
I'm writting an applicatio that that does something like this: class batchSpy(wx.Frame): def __init__(self, parent): wx.Frame.__init__( self, None, -1, Batch Spy, pos = (0,0), size = mySize) do layout ... self.searchAlarms() def searchAlarms(self): for alm in self.alarms: # self.alarms is a list of strings self.almBox.WriteText(alm) #Alm box is a wx.TextCtrl widget... self.Refresh() I Know that writing like this my wxFrame just freeze. I've tried usind wxTimer event but it doesn't help... Any hint? TNX -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Xah Lee wrote: Tabs versus Spaces in Source Code Xah Lee, 2006-05-13 In coding a computer program, there's often the choices of tabs or spaces for code indentation. snip (2) Due to the first reason, they have created and propagated a massive none-understanding and mis-use, to the degree that many tools (e.g. vi) does not deal with tabs well :set ts=n Yeah, that's really tough. vi does just fine handling tabs. vim does an even better job, with mode-lines, = and :retab. In my experience, the people who complain about the use of tabs for indentation are the people who don't know how to use their editor, and those people tend to use emacs. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
On 17 May 2006 06:51:19 -0700, Bill Pursell [EMAIL PROTECTED] wrote: In my experience, the people who complain about the use of tabs for indentation are the people who don't know how to use their editor, and those people tend to use emacs. In my experience, whenever there is a 'religious' issue like this, one side tends to be quick to pronounce the other as 'evil', and insist that everyone do things their way, while the other tends to feel comfortable with people having their own preferences. If I ever find myself on the side of the former, I always wonder if I'm missing something obvious. -- # p.d. -- http://mail.python.org/mailman/listinfo/python-list
Re: A better way of making subsclassing of built-in types stick for attributes?
Le Mercredi 17 Mai 2006 06:17, [EMAIL PROTECTED] a écrit : I want the fact that the fields are not strings to be invisible to the client programmers. You should use properties then. In [12]: class mystr(str) : pass : In [13]: class myrow(object) : : getX = lambda s : s._x : setX = lambda s, v : setattr(s, '_x', mystr(v)) : X = property(getX, setX) : : In [14]: r=myrow() In [15]: r.X = 'toto' In [16]: r.X Out[16]: 'toto' In [17]: type(r.X) Out[17]: class '__main__.mystr' -- _ Maric Michaud _ Aristote - www.aristote.info 3 place des tapis 69004 Lyon Tel: +33 426 880 097 -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Peter Decker wrote: On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: If tabs are easily misunderstood, then they are a MISfeature and they need to be removed. I don't seem to understand your point in acting as a dictator. Therefore, you are a MISfeature and need to be removed. Is the above an example of how a tab-user exercises 'logic'...? Besides, I'm not the only dictator here... there are also the: 4-space tabs dictators... 8-space tabs dictators... etc... -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: taking qoutes in arguments
oh, well you learn somthing new everyday, thanks for that :) oh and i typed the command and got '/bin/bash', means nothing at the moment but im sure it will thanks for your help Lee. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Peter Decker [EMAIL PROTECTED] wrote: In my experience, whenever there is a 'religious' issue like this, one side tends to be quick to pronounce the other as 'evil', and insist that everyone do things their way, I don't think people who use tabs are evil. They may be ignorant and misguided, but they can still have the potential to be saved though education and persuasion :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Peter Decker wrote: On 17 May 2006 06:51:19 -0700, Bill Pursell [EMAIL PROTECTED] wrote: In my experience, the people who complain about the use of tabs for indentation are the people who don't know how to use their editor, and those people tend to use emacs. In my experience, whenever there is a 'religious' issue like this, one side tends to be quick to pronounce the other as 'evil', and insist that everyone do things their way, while the other tends to feel comfortable with people having their own preferences. If I ever find myself on the side of the former, I always wonder if I'm missing something obvious. I think you unfairly snipped context on me. I was directly responding to the assertion that vi is unable to handle tabs well. As far as tabs vs. spaces, I don't think the spacers are evil, and in fact I am one for pragmatic reasons. I would much prefer to use tabs for indentation, especially since in the last few weeks I've decided to upgrade from 4 to 8, and now all of my spaced code requires much more effort than :ts=8 to fix. But in today's world, it's easier to go with the flow and use spaces. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Peter Decker wrote: Spaces look like crap, too, when using proportional fonts. ... and people who would even think that using proportional fonts for viewing/editing source code is anywhere remotely near being a good idea ... That's an even more advanced version of the i-think-tabs-are-good disease... LOL! -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
Jorge Godoy wrote Emacs guess what's used in the file and allows me to use tabs all the time, doing the correct thing... That sounds like useful behaviour. Maybe this is an area where modern editors might be able to save us from ourselves. I'll admit I'm suspicious of relying on editor functionality - I'm happier if I know I can also use the old-school methods just in case.. Sometimes adding intelligence to an interface can be a usability disaster if it makes wrong assumptions about what you want. But if people are hell-bent on converting tabs to spaces, maybe it's the best way to accommodate them. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are EVIL *and* STUPID, end of discussion. (Re: Tabs versus Spaces in Source Code)
Andy Sy enlightened us with: Now... if you say you SHOULDN'T mix tabs and spaces (indeed this is generally regarded as a BAD idea esp. in Python code) I indeed say so. then WHAT THE HECK do you need to use tab characters in the source code for anyway (besides saving a measly few bytes) ??!? To separate layout (how much indentation is used) from semantics (how many intentation levels). Tab characters are EVIL *AND* STUPID. And someone who needs to resort to all-caps words (which many consider shouting) needs to relax and use proper arguments. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: using wxPython events inside a loop
Mr BigSmoke wrote: I'm writting an applicatio that that does something like this: class batchSpy(wx.Frame): def __init__(self, parent): wx.Frame.__init__( self, None, -1, Batch Spy, pos = (0,0), size = mySize) do layout ... self.searchAlarms() def searchAlarms(self): for alm in self.alarms: # self.alarms is a list of strings self.almBox.WriteText(alm) #Alm box is a wx.TextCtrl widget... self.Refresh() I Know that writing like this my wxFrame just freeze. I've tried usind wxTimer event but it doesn't help... Any hint? Use a thread if possible, or invoke the wx-event-loop periodically. No idea how to do that in wx though - but google should help. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: Peter Decker wrote: On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: If tabs are easily misunderstood, then they are a MISfeature and they need to be removed. I don't seem to understand your point in acting as a dictator. Therefore, you are a MISfeature and need to be removed. Is the above an example of how a tab-user exercises 'logic'...? Uh, I should know better than to try to educate, but FYI: using the same argument construction and having it reach an invalid conclusion suffices to show that the original construction is invalid, and thus the original conclusion is suspect. -- # p.d. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs versus Spaces in Source Code
On 17 May 2006 07:14:33 -0700, Bill Pursell [EMAIL PROTECTED] wrote: I think you unfairly snipped context on me. I was directly responding to the assertion that vi is unable to handle tabs well. I was *agreeing* with you. Sorry if that wasn't clear. -- # p.d. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Peter Decker wrote: On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: Peter Decker wrote: On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: If tabs are easily misunderstood, then they are a MISfeature and they need to be removed. I don't seem to understand your point in acting as a dictator. Therefore, you are a MISfeature and need to be removed. Is the above an example of how a tab-user exercises 'logic'...? Uh, I should know better than to try to educate, but FYI: using the same argument construction and having it reach an invalid conclusion suffices to show that the original construction is invalid, and thus the original conclusion is suspect. I guess this *REALLY* is how a misguided tab user exercises his 'logic': Syntax replication (e.g. so-called 'argument construction') is enough, semantics don't matter. ROTFLMAO! -- It's called DOM+XHR and it's *NOT* a detergent! -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
On 5/17/06, Andy Sy [EMAIL PROTECTED] wrote: Uh, I should know better than to try to educate, but FYI: using the same argument construction and having it reach an invalid conclusion suffices to show that the original construction is invalid, and thus the original conclusion is suspect. I guess this *REALLY* is how a misguided tab user exercises his 'logic': Syntax replication (e.g. so-called 'argument construction') is enough, semantics don't matter. ROTFLMAO! My instincts were correct: it is foolhardy to attempt to educate closed minds. twitfilter status=on -- # p.d. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tabs are *MISUNDERSTOOD*, *EVIL* AND *STUPID*, end of discussion. (Re: Tabs versus Spaces in Source Code)
Andy Sy I guess this *REALLY* is how a misguided tab user exercises his 'logic': Syntax replication (e.g. so-called 'argument construction') is enough, semantics don't matter. That's quite amusing.. you've unwittingly stumbled on a pretty concise statement of Hilbert's first postulate of formal logic, proved by Godel in 1930.. ROTFLMAO! Indeed. -- http://mail.python.org/mailman/listinfo/python-list
List behaviour
Maybe I'm missing something but the latter is not the behaviour I'm expecting: a = [[1,2,3,4], [5,6,7,8]] b = a[:] b [[1, 2, 3, 4], [5, 6, 7, 8]] a == b True a is b False for i in range(len(b)): ... for x in range(4): ... b[i][x] = b[i][x] + 10 ... b [[11, 12, 13, 14], [15, 16, 17, 18]] a [[11, 12, 13, 14], [15, 16, 17, 18]] ActivePython 2.4.2 Build 248 (ActiveState Corp.) based on Python 2.4.2 (#67, Oct 30 2005, 16:11:18) [MSC v.1310 32 bit (Intel)] on win32 Windows XP Marcelo -- http://mail.python.org/mailman/listinfo/python-list
Re: List behaviour
Am Mittwoch 17 Mai 2006 17:06 schrieb [EMAIL PROTECTED]: Maybe I'm missing something but the latter is not the behaviour I'm expecting: a = [[1,2,3,4], [5,6,7,8]] b = a[:] b [[1, 2, 3, 4], [5, 6, 7, 8]] a == b True a is b False Try an: a[0] is b[0] and a[1] is b[1] here, and you'll see, that [:] only creates a shallow copy. Thus, the lists in the lists aren't copied, they are shared by the distinct lists a and b. Hope this clears it up. --- Heiko. -- http://mail.python.org/mailman/listinfo/python-list
Re: List behaviour
[EMAIL PROTECTED] wrote: Maybe I'm missing something but the latter is not the behaviour I'm expecting: a = [[1,2,3,4], [5,6,7,8]] b = a[:] b [[1, 2, 3, 4], [5, 6, 7, 8]] a == b True a is b False for i in range(len(b)): ... for x in range(4): ... b[i][x] = b[i][x] + 10 ... b [[11, 12, 13, 14], [15, 16, 17, 18]] a [[11, 12, 13, 14], [15, 16, 17, 18]] b = a[:] does clone a, but doesn't make a deepcopy of its contents, which you are manipulating! So do [GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2 Type help, copyright, credits or license for more information. poWelcome to rlcompleter2 0.96 for nice experiences hit tab multiple times import copy a = [[10]] b = copy.deepcopy(a) b[0][0] = 20 a [[10]] b [[20]] HTH, Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: List behaviour
When you did: b = a[:] b was then a copy of a, rather than just a reference to the same a. But what does a contain? It contains two sublists -- that is, it contains references to two sublists. So b, which is now a copy of a, contains copies of the two references to the same two sublists. What you need to do instead is: b = copy.deepcopy(a) to get you what you actually want. -- http://mail.python.org/mailman/listinfo/python-list
Pyparsing: Grammar Suggestion
I am trying to come up with a grammar that describes the following: record = f1,f2,...,fn END_RECORD All the f(i) has to be in that order. Any f(i) can be absent (e.g. f1,,f3,f4,,f6 END_RECORD) Number of f(i)'s can vary. For example, the followings are allowed: f1,f2 END_RECORD f1,f2,,f4,,f6 END_RECORD Any suggestions? Thanks, Khoa -- http://mail.python.org/mailman/listinfo/python-list
Re: A better way of making subsclassing of built-in types stick for attributes?
Maric Michaud wrote: Le Mercredi 17 Mai 2006 06:17, [EMAIL PROTECTED] a écrit : I want the fact that the fields are not strings to be invisible to the client programmers. You should use properties then. I started with that idea, using the recipie 20.2 from the cookbook. However, this caused a fair amount of code bloat... Err the way I implemented it did at least. I may be missing a way to regularize the process and make the whole process cleaner too. The problem was that I needed to set the properties for all of the object fields with boilerplate code that looks very much the same. Even if the boilerplate was small, it was still bigger than the one-line descriptor definitions at the bottom of the module. Shrinking the descriptor definitions to a one-liner shrunk the code by a fair bit. There are many classes (100+ when I'm done) and some of them have a fair number of fields (up to 50) and all of them have to have the snazzyStr abilities. Another problem was esthetics; it forces me to place the main class at the bottom of the module after the definition of the supporting classes. Putting the descriptors after the bottom of the module left the important parts at the top where they should be, IMO. I wanted to use supporting classes for the field definitions because it allowed me to use mix-ins. This was the biggest win in the design. Thanks t4 -- http://mail.python.org/mailman/listinfo/python-list
How to couple pyunit with GUI?
I am desperately looking for an info how to combine a testing application with decent GUI interface - the way most xUnits do. I believe I have seen something about using Tkinter, but I do not remember - where. I am working on a complex testing application built over unittest module, and I need GUI interface that will alllow me to select tests at different levels of test hierarchy tree. I am new to python, so say everything slow and repeat it twice:) -- http://mail.python.org/mailman/listinfo/python-list
Process forking on Windows
Hi everyone, I have a python program that will need to interact with an MQSeries trigger monitor. It does this fine but it hogs the trigger monitor while it executes. I'd like to fork the program off and terminate the parent process so that the trigger monitor frees up. Does anyone how this can be accomplished on a Windows platform? I've looked at doing this via the subprocess module but this doesn't look like the correct approach. Any help you can provide would be greatly appreciated. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: List behaviour
Thank you very much. It was clear. -- http://mail.python.org/mailman/listinfo/python-list
Re: Process forking on Windows
Andrew Robert wrote: Hi everyone, I have a python program that will need to interact with an MQSeries trigger monitor. It does this fine but it hogs the trigger monitor while it executes. I'd like to fork the program off and terminate the parent process so that the trigger monitor frees up. Does anyone how this can be accomplished on a Windows platform? I've looked at doing this via the subprocess module but this doesn't look like the correct approach. Any help you can provide would be greatly appreciated. Thanks The subprocess module gives a (mostly) platform independent way for one process to start another. It provides a number of bells and whistles, and is the latest module on a long history of older modules to provide such functionality. Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
Re: Process forking on Windows
Andrew Robert wrote:
Hi everyone,
I have a python program that will need to interact with an MQSeries
trigger monitor.
It does this fine but it hogs the trigger monitor while it executes.
I'd like to fork the program off and terminate the parent process so
that the trigger monitor frees up.
just-asking
Is this really the solution ?
/just-asking
Does anyone how this can be accomplished on a Windows platform?
AFAIK, there's no fork in Windows - you might want to give a try with
CreateProcess.
http://www.byte.com/art/9410/sec14/art3.htm
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnucmg/html/UCMGch01.asp
HTH
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Pyparsing: Grammar Suggestion
Am Mittwoch 17 Mai 2006 17:24 schrieb Khoa Nguyen: Any suggestions? If you're not limited to PyParsing, pyrr.ltk/ptk might be appropriate for you here (if you're used to bison/flex). The following file implements a small sample lexer/parser which does exactly what you need. pyrr.ltk (the lexing toolkit) is stable, but pyrr.ptk isn't yet, but it's nevertheless available under: http://hg.modelnine.org/hg/pyrr as a mercurial repository. I'd advise you to take the version from the repository, if you're interested in it, as my packaged versions always had quirks, which the current head of the repository doesn't, AFAICT. Anyway, the following implements the parser/lexer for you: from pyrr.ltk import LexerBase, IgnoreMatch from pyrr.ptk import ParserBase class SampleLexer(LexerBase): def f(self,match,data): r f1 [10]- /f1/ f2 [10]- /f2/ f3 [10]- /f3/ f4 [10]- /f4/ f5 [10]- /f5/ f6 [10]- /f6/ Create your specific matches for each of the fs here... return data def fid(self,match,data): r fid - ri/[a-z_][a-z0-9_]*/ Match a record identifier. return data def end_of_record(self,match,data): r EOR - /END_OF_RECORD/ Your end of record marker... def operators(self,match,data): r nl - e/\n/ c - /,/ eq - /=/ Newline is something that I have inserted here... def ws(self,match,data): r ws - r/\s+/ Ignore all whitespace that occurs somewhere in the input. raise IgnoreMatch class SampleParser(ParserBase): __start__ = ifile def ifile(self,data): ifile - record+ return dict(data) def record(self,fid,eq,f1,c1,f2,c2,f3,c3,f4,c4,f5,c5,f6,eor,nl): record - /fid/ /eq/ /f1/? /c/ /f2/? /c/ /f3/? /c/ /f4/? /c/ /f5/? /c/ /f6/? /EOR/ /nl/ return (fid,(f1,f2,f3,f4,f5,f6)) data = rrecmark = f1,f2,,f4,f5,f6 END_OF_RECORD recmark2 = f1,f2,f3,f4,,f6 END_OF_RECORD print SampleParser.parse(SampleLexer(data)) HTH! --- Heiko. -- http://mail.python.org/mailman/listinfo/python-list
