Re: exceptions and unicode
On 06/16/2010 03:53 PM, Martin v. Loewis wrote: So how do I get what I want? Submit a patch. You would have to explain why this is a bug fix and not a new feature, as new features are not allowed anymore for 2.x. Thanks. Actually I have no idea if this is a bug or a feature (despite reading bug tracker issues 2517 and 6108, most of which I did not understand) so I'm not in a position to argue either. What I think I'll do is note in my documentation that the unreadable error messages are from Python and are only temporary for a couple years until the app can move to Python 3. -- http://mail.python.org/mailman/listinfo/python-list
Re: exceptions and unicode
On 06/16/2010 03:51 PM, Thomas Jollans wrote: On 06/16/2010 10:10 PM, Stuart McGraw wrote: Note that the exceptions may be anything (I just used IOError as an example) and are generated in bowels of an API that I can't/won't mess with. Yeah, well, you'd have to special-case every single exception type that gets unicode arguments, as they probably all treat them in the same ungrateful way. Unfortunate. In general it does not seem possible to know what exceptions could be generated (they could be custom exceptions defined in the api) without examining all the code. Seems like I'll have to live with it or try some grotesque hack like looking for a repr-of-a-unicode-string-like text and converting back to unicode. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
exceptions and unicode
I am having a problem with exceptions and unicode.
try: open ('file.txt')
except IOError, e: pass
str (e)
= [Errno 2] No such file or directory: 'file.txt'
which is fine but...
try: open (u'フィイル.txt')
except IOError, e: pass
str (e)
= [Errno 2] No such file or directory: u'\\u30d5\\u30a3\\u30a4\\u30eb.txt'
ok, I did ask for a str string so no reason I should expect a unicode
string, but then (in Python 2.6)...
unicode (e)
= u(2, 'No such file or directory')
i.e. no formatting at all, or in Python 2.6.5
unicode (e)
= u[Errno 2] No such file or directory: u'\\u30d5\\u30a3\\u30a4\\u30eb.txt'
i.e. the result is a unicode string in name only. :-(
What I was expecting (or at least hoping for) of course was
= u[Errno 2] No such file or directory: '\u30d5\u30a3\u30a4\u30eb.txt'
which when printed would produce something useful
= [Errno 2] No such file or directory: 'フィイル.txt'
So how do I get what I want? (Python 3.x is not an option.)
Note that the exceptions may be anything (I just used IOError
as an example) and are generated in bowels of an API that I
can't/won't mess with.
--
http://mail.python.org/mailman/listinfo/python-list
Re: does raw_input() return unicode?
Martin v. Löwis [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Stuart McGraw schrieb: So, does raw_input() ever return unicode objects and if so, under what conditions? At the moment, it only returns unicode objects when invoked in the IDLE shell, and only if the character entered cannot be represented in the locale's charset. Thanks for the answer. Also, if anyone has a solution for Duncan Booth's attempt to wrap stdin, I would find it very useful too! Duncan Booth [EMAIL PROTECTED] wrote: Stuart McGraw [EMAIL PROTECTED] wrote: So, does raw_input() ever return unicode objects and if so, under what conditions? It returns unicode if reading from sys.stdin returns unicode. Unfortunately, I can't tell you how to make sys.stdin return unicode for use with raw_input. I tried what I thought should work and as you can see it messed up the buffering on stdin. Does anyone else know how to wrap sys.stdin so it returns unicode but is still unbuffered? Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import sys, codecs sys.stdin.encoding 'cp437' sys.stdin = codecs.getreader(sys.stdin.encoding)(sys.stdin) raw_input() hello world still going? ^Z ^Z u'hello world' -- http://mail.python.org/mailman/listinfo/python-list
does raw_input() return unicode?
In the announcement for Python-2.3 http://groups.google.com/group/comp.lang.python/msg/287e94d9fe25388d?hl=en it says raw_input(): can now return Unicode objects. But I didn't see anything about this in Andrew Kuchling's 2.3 What's New, nor does the current python docs for raw_input() say anything about this. A test on a MS Windows system with a cp932 (japanese) default locale shows the object returned by raw_input() is a str() object containing cp932 encoded text. This remained true even when I set Python's default encoding to cp932 (in sitecustomize.py). So, does raw_input() ever return unicode objects and if so, under what conditions? -- http://mail.python.org/mailman/listinfo/python-list
Re: elementtree: line numbers and iterparse
Fredrik Lundh [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Stuart McGraw wrote: Now I find i need to get and save the input file line number of each node. Googling turned up a way to do it by subclassing FancyTreeBuilder, (http://groups.google.com/group/comp.lang.python/msg/45f5313409553b4b?hl=en;) but that tries to read everything at once. Is there a way to do something similiar with iterparse()? something like this could work: ...snip... Indeed it does. Many thanks! -- http://mail.python.org/mailman/listinfo/python-list
elementtree: line numbers and iterparse
I have a broad (~200K nodes) but shallow xml file I want to parse with Elementtree. There are too many nodes to read into memory simultaneously so I use iterparse() to process each node sequentially. Now I find i need to get and save the input file line number of each node. Googling turned up a way to do it by subclassing FancyTreeBuilder, (http://groups.google.com/group/comp.lang.python/msg/45f5313409553b4b?hl=en;) but that tries to read everything at once. Is there a way to do something similiar with iterparse()? -- http://mail.python.org/mailman/listinfo/python-list
bizarre id() results
The following was cut and pasted exactly (except for the # lines which I added after the fact) from an interactive python session in a Window 2000 cmd.exe window. Can somebody please explain to me what the heck is going on?!?! Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. class A: ... def m1(self): print m1 ... def m2(self): print m2 ... a = A() a.m1() m1 a.m2() m2 # ok, both methods work and give the expected results # so i presume they are different methods. id(a.m1) 9202984 id(a.m2) 9202984 id(a.m1)==id(a.m2) True # Huh? They seem to be the same. a.m1 is a.m2 False # But not the same... a.m1 bound method A.m1 of __main__.A instance at 0x00923B98 a.m2 bound method A.m2 of __main__.A instance at 0x00923B98 # Let's look at them in hex... hex(id(a.m1)) '0x8c6d28' hex(id(a.m2)) '0x8e7b48' # Now they are different. 0x8c6d28-9202984, 0x8e7b48-9337672 id(a.m1) 9337672 id(a.m2) 9337672 # Now they are both equal to the second one. hex(id(a.m1)) '0x8e7b48' hex(id(a.m2)) '0x8e7b48' # in hex too. id built-in function id hex built-in function hex # just double checking! Why??? This is so bizarre I'm sure I am doing something really stupid. -- http://mail.python.org/mailman/listinfo/python-list
Re: bizarre id() results
Delaney, Timothy (Tim) [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] and several other people responded with similar information. [...] Bound methods are created on the fly. [...] Ahhh! That was the piece I was missing. Thank you all! -- http://mail.python.org/mailman/listinfo/python-list
Re: Why are there no ordered dictionaries?
A.M. Kuchling [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [...] What would improve the Cheese Shop's interface for you? Getting rid of those damn top level links to old versions. Seeing a long list of old versions, when 99% of visitors are only interested in the current version, is just visual noise, and really lame. Move the old version links onto the page describing the software. -- http://mail.python.org/mailman/listinfo/python-list
Re: Why are there no ordered dictionaries?
Fredrik Lundh [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Stuart McGraw wrote What would improve the Cheese Shop's interface for you? Getting rid of those damn top level links to old versions. Seeing a long list of old versions, when 99% of visitors are only interested in the current version, is just visual noise, and really lame. Move the old version links onto the page describing the software. hmm? the pypi package automatically hides old versions when you post new ones, and it's been that way for ages... (which is bloody annoying if you're a package developers, since it means that alphas for the next release hides the most recent stable version) looking at the full index, ZODB seems to be the only package that's available in more than just one stable and one development version... http://cheeseshop.python.org/pypi?:action=browseasdf=405 - ClientForm-0.1.17 - ClientForm-0.2.1b ... - EmPy_3.1 - EmPy_3.1.1 - EmPy_3.2 - EmPy_3.3 ... - FauxIdent-1.1 - FauxIdent-1.2 - FauxIdent-1.2.1 ... Well, it is better than I remember it being a while (year?) ago, my recollection is that many packages had many, many old versions listed but now I usualy see only a couple versions. Hmm, so two versions means one is a development version, and the other is a stable version? I did not know that, and did not see it documented on the site. I would say documenting that would be an interface improvement. I still think it would be better to have just a package name (with current version) listed in the index page(s), and have alternate versions (old, alpha testing, etc) listed on the package's description page. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Book
David Beasley's Essential Python (New Riders). It's a little dated now (covers only up to version 2.2) but lucid, consise, well organized. It restricts itself to Python's syntax and semantics and does not waste time explaining basic programming concepts. I made several attempts to learn Python but found the Python docs pretty poor, and the tutorial books I looked at were incredibly ponderous and slow. It wasn't until I got Beasley's book that I could actual find info effectively enough to start actually writing Python code. I still most often refer to it in preference to the Python docs. David Rasmussen [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] What is the best book for Python newbies (seasoned programmer in other languages)? /David -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Book
Stuart McGraw [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] David Beasley's Essential Python (New Riders). It's a little dated now (covers only up to version 2.2) [...] Oops, that should be Beazley, Python Essential Reference, and version 2.1. -- http://mail.python.org/mailman/listinfo/python-list
Re: wxpython - passing arg to wx.app OnInit
Peter Hansen [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Stuart McGraw wrote: I have a wxPython app, conventionally structured with a Application class derived from wx.App. My problem is that the app accepts a command line argument that must be acted upon within the OnInit() method of the Application class. How do I pass it cleanly from main() into app.OnInit()? In the simplified example below, dbfn is the piece of info that is in main() that OnInit() needs to use. Is a global variable is the only way? :-( There are various ways, but the simplest is to accept that sys.argv is *already* a global and just to access it directly from the Application's OnInit() method. This wiki page demonstrates: http://wiki.wxpython.org/index.cgi/UsingCommandLineArguments -Peter I simplied the my code for posting. In my real program, the thing being passed is not a command line argument per se, but the result of signifigant processing dependent on the command line argument. I do not want to repeat that processing in the wx.App method. Would you elaborate on the other ways? -- http://mail.python.org/mailman/listinfo/python-list
wxpython - passing arg to wx.app OnInit
I have a wxPython app, conventionally structured with a Application class derived from wx.App. My problem is that the app accepts a command line argument that must be acted upon within the OnInit() method of the Application class. How do I pass it cleanly from main() into app.OnInit()? In the simplified example below, dbfn is the piece of info that is in main() that OnInit() needs to use. Is a global variable is the only way? :-( class Application (wx.App): def OnInit (self): oper = Operations (dbfn); frame = Frame (None, -1, Title, oper) self.SetTopWindow (frame) return True def main (): dbfn = sys.args[1] app = Application (redirect=0) app.MainLoop () Apologies if the answer is (or should be) obvious... this is my first time using wxWindows and I am still rather new to Python. -- http://mail.python.org/mailman/listinfo/python-list
