ANN: Spyder v2.1.11
Hi all, On the behalf of Spyder's development team (http://code.google.com/p/spyderlib/people/list), I'm pleased to announce that Spyder v2.1.11 has been released and is available for Windows XP/Vista/7, GNU/Linux and MacOS X: http://code.google.com/p/spyderlib/ This is a pure maintenance release -- a lot of bugs were fixed since v2.1.10: http://code.google.com/p/spyderlib/wiki/ChangeLog Spyder is a free, open-source (MIT license) interactive development environment for the Python language with advanced editing, interactive testing, debugging and introspection features. Originally designed to provide MATLAB-like features (integrated help, interactive console, variable explorer with GUI-based editors for dictionaries, NumPy arrays, ...), it is strongly oriented towards scientific computing and software development. Thanks to the `spyderlib` library, Spyder also provides powerful ready-to-use widgets: embedded Python console (example: http://packages.python.org/guiqwt/_images/sift3.png), NumPy array editor (example: http://packages.python.org/guiqwt/_images/sift2.png), dictionary editor, source code editor, etc. Description of key features with tasty screenshots can be found at: http://code.google.com/p/spyderlib/wiki/Features On Windows platforms, Spyder is also available as a stand-alone executable (don't forget to disable UAC on Vista/7). This all-in-one portable version is still experimental (for example, it does not embed sphinx -- meaning no rich text mode for the object inspector) but it should provide a working version of Spyder for Windows platforms without having to install anything else (except Python 2.x itself, of course). Don't forget to follow Spyder updates/news: * on the project website: http://code.google.com/p/spyderlib/ * and on our official blog: http://spyder-ide.blogspot.com/ Last, but not least, we welcome any contribution that helps making Spyder an efficient scientific development/computing environment. Join us to help creating your favourite environment! (http://code.google.com/p/spyderlib/wiki/NoteForContributors) Enjoy! -Pierre -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
PyCon UK Call for Papers
PyCon UK 2012, the UK's official Python conference, returns from the 28th September to 1st October, Coventry UK. http://www.pyconuk.org/ This volunteer run and organised conference includes sprints, training, open space and social events. For more information please see our site at pyconuk.org and our wiki at pyconuk.net If you would like to share your expertise, tell us your horror stories or pimp your project, please consider giving a talk at PyConUK. Your talk should reflect at least one of our four themes ( http://pyconuk.net/Themes ). When planning your talk, it should be no more than 40 minutes. Please email us the following: Your name A contact number A one paragraph biography The title of your talk A short one paragraph abstract Which theme (or themes) your talk can be categorised under. If we accept your talk, we would also require a longer abstract in order to create a wiki page. To submit a talk, please email sub...@pyconuk.net before Tuesday 14th August 2012. If you have already given us your talks, and had confirmation from John or Zeth, then ignore this message, but we still need the data in the wiki if it is not already there. Best Wishes, PyCon UK Team -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: OT: Text editors
rusi rustompm...@gmail.com writes: Do you use the emacs builtin python mode or the separate python-mode? I'm not sure. I have both installed. I try to keep my Emacs setup portable across different machines, so I'm probably using the built-in mode. Do you use pdb? Occasionally, but I haven't learned how to do that in Emacs. Any other special setups? GNU Screen and Emacs are the foundation of my programming environment. How about ipython? Never really liked it nor saw a need for it. I use the Python interactive console, with GNU readline so I get history preserved and tab-completion. But I am getting increasing 'funny looks' for not (for example) using eclipse.] Unless those funny looks are accompanied by compelling reasons to invest a whole lot of effort into learning a rather slow and complex program, then it seems you can ignore them. -- \ “The way to build large Python applications is to componentize | `\ and loosely-couple the hell out of everything.” —Aahz | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 29/07/2012 06:08, Ben Finney wrote: Tim Chase python.l...@tim.thechases.com writes: On Sat, Jul 28, 2012 at 6:29 PM, Mark Lawrence wrote: I highly recommend the use of notepad++. If anyone knows of a better text editor for Windows please let me know :) I highly recommend not tying your editor skills to a single OS, especially one as ornery for programmers as Windows. I'll advocate for Vim which is crazy-powerful and works nicely on just about any platform I touch. Others will advocate for Emacs, which I can't say fits the way my brain works but it's also powerful and loved by many. Right. I'm in Tim's position, but reversed: my preference is for Emacs but Vim is a fine choice also. They are mature, well-supported with regular updates and a massive library of plug-ins for different uses, have a huge community to help you, and work on all major programming OSen. The ubiquity of these two platforms makes a worthwhile investment of time spent in learning at least one if not both. I use both frequently in my work for different things, and they are good for pretty much any task involving manipulation of text. Learn one of Emacs or Vim well, and you won't need to worry about text editors again. Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? -- Cheers. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
Python Error
Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Thanking You in Advance, Regards, Subhabrata Banerjee. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
subhabangal...@gmail.com wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Add a print statement before the offending line: print list1 set1 = set(list1) You will see that list1 contains another list, e. g. this works... list1 = [alpha, beta] set(list1) set(['alpha', 'beta']) ...while this doesn't: list1 = [alpha, [beta]] set(list1) Traceback (most recent call last): File stdin, line 1, in module TypeError: unhashable type: 'list' -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 07/29/12 05:28, Mark Lawrence wrote: On 29/07/2012 06:08, Ben Finney wrote: Tim Chase python.l...@tim.thechases.com writes: Learn one of Emacs or Vim well, and you won't need to worry about text editors again. Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? Though I'm personally far more vitriolic about VMS vs $OS (had a few souring experiences with VMS in college) than I am regarding Vim vs. Emacs, you can get Vim for at least OpenVMS: http://www.vim.org/download.php#others I presume sources compile fairly well on other flavors of VMS if needed, and I'd expect Emacs can do likewise[1] -tkc [1] http://www.emacswiki.org/emacs/EmacsOnVMS -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Sunday, July 29, 2012 2:57:18 PM UTC+5:30, (unknown) wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) Dear Peter, Thanks for the answer. But my list does not contain another list that is the issue. Intriguing. Thinking what to do. Regards, Subhabrata. the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Thanking You in Advance, Regards, Subhabrata Banerjee. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On 07/29/2012 02:30 PM, subhabangal...@gmail.com wrote: Thanks for the answer. But my list does not contain another list that is the issue. Intriguing. Thinking what to do. What does your list contain? Can you reproduce the issue in a few self-contained lines of code that you can show us, that we can test ourselves? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
Hi, Have you tried printing the list which is passed onto the set. The items in the list passed should be hashable and possibly there are objects which are not hashable. On Sun, Jul 29, 2012 at 2:30 PM, subhabangal...@gmail.com wrote: On Sunday, July 29, 2012 2:57:18 PM UTC+5:30, (unknown) wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) Dear Peter, Thanks for the answer. But my list does not contain another list that is the issue. Intriguing. Thinking what to do. Regards, Subhabrata. the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Thanking You in Advance, Regards, Subhabrata Banerjee. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On Sun, 29 Jul 2012, python.l...@tim.thechases.com wrote: On 07/29/12 05:28, Mark Lawrence wrote: On 29/07/2012 06:08, Ben Finney wrote: Tim Chase python.l...@tim.thechases.com writes: Learn one of Emacs or Vim well, and you won't need to worry about text editors again. Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? Though I'm personally far more vitriolic about VMS vs $OS (had a few souring experiences with VMS in college) than I am regarding Vim vs. Emacs, you can get Vim for at least OpenVMS: http://www.vim.org/download.php#others I presume sources compile fairly well on other flavors of VMS if needed, and I'd expect Emacs can do likewise[1] I used to use tpu (used to have piles of tpu macros..) and I first got used to emacs by using its tpu mode - I see that still exists so you can use emacs and pretend it is really tpu! Robert -- La grenouille songe..dans son château d'eau Links and things http://rmstar.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On 29/07/2012 13:30, subhabangal...@gmail.com wrote: On Sunday, July 29, 2012 2:57:18 PM UTC+5:30, (unknown) wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) Dear Peter, Thanks for the answer. But my list does not contain another list that is the issue. Intriguing. Thinking what to do. Regards, Subhabrata. Can you loop round the list and print each entry and its type, that should give you some clues? the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Thanking You in Advance, Regards, Subhabrata Banerjee. -- Cheers. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Sun, 29 Jul 2012 05:30:15 -0700, subhabangalore wrote: Dear Peter, Thanks for the answer. But my list does not contain another list that is the issue. Intriguing. That is not what the error message says. You said that this line of code: set1=set(list1) gives this error: TypeError: unhashable type: 'list' Almost certainly, either you are mistaken about the line of code which gives the error, or you are mistaken about the error, or you are mistaken that your list does not contain any lists. Thinking what to do. Exactly what Peter suggested: print the list before you try to convert it to a set, and see what it actually contains. It will also help you to read this page and try to follow its advice: http://sscce.org/ -- Steven -- http://mail.python.org/mailman/listinfo/python-list
newbie: write new file (from a server)
Hi,
I have a client. He sends file content (as bytes) to my server. The server
receives this content as bytes and decodes it to string. Then the server opens
a file (filename comes from client) try to write the file-content to the new
file.
It works but there are parts of the client file content in the new file.
I tested it: the whole content from client comes to the server.
Can anybody help me?
My server code:
-
import socketserver
class MyTCPServer(socketserver.BaseRequestHandler):
def handle(self):
s = ''
li = []
addr = self.client_address[0]
print([{}] Connected! .format(addr))
while True:
bytes = self.request.recv(4096)
if bytes:
s = bytes.decode(utf8)
print(s)
li = s.split(~)
with open(li[0], 'w') as fp:
fp.write(li[1])
#... main ..
if __name__ == __main__:
server = socketserver.ThreadingTCPServer((, 12345), MyTCPServer)
server.serve_forever()
o-o
Thomas
--
http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 29/07/2012 14:36, Robert Marshall wrote: On Sun, 29 Jul 2012, python.l...@tim.thechases.com wrote: On 07/29/12 05:28, Mark Lawrence wrote: On 29/07/2012 06:08, Ben Finney wrote: Tim Chase python.l...@tim.thechases.com writes: Learn one of Emacs or Vim well, and you won't need to worry about text editors again. Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? Though I'm personally far more vitriolic about VMS vs $OS (had a few souring experiences with VMS in college) than I am regarding Vim vs. Emacs, you can get Vim for at least OpenVMS: http://www.vim.org/download.php#others I presume sources compile fairly well on other flavors of VMS if needed, and I'd expect Emacs can do likewise[1] I used to use tpu (used to have piles of tpu macros..) and I first got used to emacs by using its tpu mode - I see that still exists so you can use emacs and pretend it is really tpu! Robert Well knock me down with a feather, clevor Trevor[1], might have to give that a go, thanks. [1] Ian Dury and the Blockheads album New Boots and Panties, song called Clevor Trevor for those of you who clearly lack a suitable education :) -- Cheers. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
newbie: write content in a file (server-side)
Hi,
I send from a client file content to my server (as bytes). So far so good.
The server receives this content complete. Ok. Then I want to write this
content to a new file. It works too. But in the new file are only the first
part of the whole content.
What's the problem.
o-o
Thomas
Here's my server code:
import socketserver
class MyTCPServer(socketserver.BaseRequestHandler):
def handle(self):
s = ''
li = []
addr = self.client_address[0]
print([{}] Connected! .format(addr))
while True:
bytes = self.request.recv(4096)
if bytes:
s = bytes.decode(utf8)
print(s)
li = s.split(~)
with open(li[0], 'w') as fp:
fp.write(li[1])
#... main ..
if __name__ == __main__:
server = socketserver.ThreadingTCPServer((, 12345), MyTCPServer)
server.serve_forever()
--
http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 29 July 2012 06:36, rusi rustompm...@gmail.com wrote: Just curious about your emacs+python usage. Do you use the emacs builtin python mode or the separate python-mode? Do you use pdb? Any other special setups? One thing that I find very useful is to configure flymake to use pyflakes. Very useful to get feedback on unused imports / unused variables / undefined variables (which means you spot typos on variable names straight away). For instructions, see e.g. http://www.plope.com/Members/chrism/flymake-mode -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
In article 81818a9c-60d3-48da-9345-0c0dfd5b2...@googlegroups.com, subhabangal...@gmail.com wrote: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' First, make sure you understand what the error means. All the elements of a set must be hashable. Lists are not hashable because they are mutable. So, what the error is telling you is that some element of list1 is itself a list, and therefore not hashable, and thus the set can't be created. I would start by printing list1. If the list is long (or contains deeply nested structures), just doing print list1 may result in something that is difficult to read. In that case, try using pprint (see the pprint module) to get a nicer display. If it's still not obvious, pull out the bigger guns. Try something like: for item in list1: try: hash(item) except TypeError: print This one can't be hashed: %s % item And sometimes some good running program gives error all on a sudden with no parameter changed Well, *something* changed. Assuming nothing truly bizarre like a stray Higgs Boson flipping a bit in your computer's memory, what you need to do is figure out what that is. Did you change your code in any way (having everything under version control helps here)? If not the code, then what changed about the input? If you're sure that both the code and the input are unchanged, that leaves something in the environment. Did your python interpreter get upgraded to a newer version? Or your operating system? PYTHONPATH? Depending on what your program is doing, it could be something time based. A different time zone, perhaps? Did daylight savings time just go into or out of effect where you are? Does it only fail on Sunday? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Sun, Jul 29, 2012 at 01:08:57PM +0200, Peter Otten wrote: subhabangal...@gmail.com wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' Add a print statement before the offending line: print list1 set1 = set(list1) You will see that list1 contains another list, e. g. this works... Peter's right, but instead of a print before the line, put a try/except around it, like try: set1 = set(list1) except TypeError: print list1 raise This way, only the *actual* error triggers any output. With a general print before, you can get a lot of unnecessary output. Grits, J -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Sunday, July 29, 2012 7:53:59 PM UTC+5:30, Roy Smith wrote: In article 81818a9c-60d3-48da-9345-0c0dfd5b2...@googlegroups.com, subhabangal...@gmail.com wrote: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' First, make sure you understand what the error means. All the elements of a set must be hashable. Lists are not hashable because they are mutable. So, what the error is telling you is that some element of list1 is itself a list, and therefore not hashable, and thus the set can't be created. I would start by printing list1. If the list is long (or contains deeply nested structures), just doing print list1 may result in something that is difficult to read. In that case, try using pprint (see the pprint module) to get a nicer display. If it's still not obvious, pull out the bigger guns. Try something like: for item in list1: try: hash(item) except TypeError: print This one can't be hashed: %s % item And sometimes some good running program gives error all on a sudden with no parameter changed Well, *something* changed. Assuming nothing truly bizarre like a stray Higgs Boson flipping a bit in your computer's memory, what you need to do is figure out what that is. Did you change your code in any way (having everything under version control helps here)? If not the code, then what changed about the input? If you're sure that both the code and the input are unchanged, that leaves something in the environment. Did your python interpreter get upgraded to a newer version? Or your operating system? PYTHONPATH? Depending on what your program is doing, it could be something time based. A different time zone, perhaps? Did daylight savings time just go into or out of effect where you are? Does it only fail on Sunday? Hi Roy, Sorry I overlooked your answer. It fails generally on Sunday. True. How you got it? I recently downloaded Python2.7 64 bit -while I am working on Python3.2.1 64 bit Windows 7 SP1. Regards, Subhabrata Banerjee. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On 7/29/2012 5:30 AM subhabangal...@gmail.com said...
On Sunday, July 29, 2012 2:57:18 PM UTC+5:30, (unknown) wrote:
Dear Group,
I was trying to convert the list to a set, with the following code:
set1=set(list1)
Thanks for the answer. But my list does not contain another list that is the
issue. Intriguing. Thinking what to do.
Now you need to identify the type of the object that is causing python
to misreport the unhashable type causing the error as the error you're
getting says list and you say there isn't one. So, now we have a python
bug.
set ([1,2,3])
set([1, 2, 3])
set ([1,2,[]])
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: unhashable type: 'list'
set ([1,2,{}])
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: unhashable type: 'dict'
the code was running fine, but all on a sudden started to give the
following error,
set1=set(list1)
TypeError: unhashable type: 'list'
Try adding the following:
for ii in list1:
try:
set([ii])
except:
print this causes an error type (val): %s (%s) (type(ii),ii)
Either it's a python bug or there really is a list in there.
Emile
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Sunday, July 29, 2012 2:57:18 PM UTC+5:30, (unknown) wrote: Dear Group, I was trying to convert the list to a set, with the following code: set1=set(list1) the code was running fine, but all on a sudden started to give the following error, set1=set(list1) TypeError: unhashable type: 'list' please let me know how may I resolve. And sometimes some good running program gives error all on a sudden with no parameter changed, how may I debug it? Thanking You in Advance, Regards, Subhabrata Banerjee. Dear Group, Thank you for your kind time and reply. True as Steven pointed the error should be specific. I tested. Put comment mark before the set assignment, printed the list as Peter suggested, taken the print of the list, but no it is not my problem, as you suggested what is contained in the list, I am taking out the values and then assigning blank list and appending the processed values in the list. If this kind of problems happen, --rare but in my 6 yrs Python experience happened sometimes--then I take a new window, rewrite or copy the earlier code module by module, give a new method name--believe it or not--- works. Regards, Subhabrata. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Error
On Mon, Jul 30, 2012 at 12:36 AM, subhabangal...@gmail.com wrote: If this kind of problems happen, --rare but in my 6 yrs Python experience happened sometimes--then I take a new window, rewrite or copy the earlier code module by module, give a new method name--believe it or not--- works. If that solves your problem, it may be that you inadvertently shadowed a built-in - maybe you assigned to set or list or something. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: newbie: write content in a file (server-side)
Thomas Kaufmann wrote: I send from a client file content to my server (as bytes). So far so good. The server receives this content complete. Ok. Then I want to write this content to a new file. It works too. But in the new file are only the first part of the whole content. What's the problem. Here's my server code: while True: bytes = self.request.recv(4096) if bytes: s = bytes.decode(utf8) print(s) li = s.split(~) with open(li[0], 'w') as fp: fp.write(li[1]) - Do you ever want to leave the loop? - You calculate a new filename on every iteration of the while loop -- probably not what you intended to do. - The w argument tells Python to overwrite the file if it exists. You either need to keep the file open (move the with... out of the loop) or open it with a. - You may not receive the complete file name on the first iteration of the while loop. - The bytes buffer can contain incomplete characters, e. g.: data = b\xc3\xa4 data.decode(utf-8) 'ä' data[:1].decode(utf-8) Traceback (most recent call last): File stdin, line 1, in module UnicodeDecodeError: 'utf8' codec can't decode byte 0xc3 in position 0: unexpected end of data -- http://mail.python.org/mailman/listinfo/python-list
Is Python a commercial proposition ?
Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group Many thanks Lipska -- Lipska the Kat: Troll hunter, sandbox destroyer and farscape dreamer of Aeryn Sun -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 29/07/2012 15:15, Mark Lawrence wrote: On 29/07/2012 14:36, Robert Marshall wrote: On Sun, 29 Jul 2012, python.l...@tim.thechases.com wrote: On 07/29/12 05:28, Mark Lawrence wrote: On 29/07/2012 06:08, Ben Finney wrote: Tim Chase python.l...@tim.thechases.com writes: Learn one of Emacs or Vim well, and you won't need to worry about text editors again. Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? Though I'm personally far more vitriolic about VMS vs $OS (had a few souring experiences with VMS in college) than I am regarding Vim vs. Emacs, you can get Vim for at least OpenVMS: http://www.vim.org/download.php#others I presume sources compile fairly well on other flavors of VMS if needed, and I'd expect Emacs can do likewise[1] I used to use tpu (used to have piles of tpu macros..) and I first got used to emacs by using its tpu mode - I see that still exists so you can use emacs and pretend it is really tpu! Robert Well knock me down with a feather, clevor Trevor[1], might have to give that a go, thanks. [1] Ian Dury and the Blockheads album New Boots and Panties, song called Clevor Trevor for those of you who clearly lack a suitable education :) There appears to be some confusion about the spelling, but it might be Clevor Trever. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
http://www.djangosites.org/ Instagram, Pinterest, Washington Post, and The Onion all use djangoto run their websites. http://stackoverflow.com/questions/1906795/what-are-some-famous-websites-built-in-django Django is of course a very highly-regarded web framework written in python, but there are other good python frameworks out there with strong user bases. Python is used frequently on the server side of web applications for sites of all sizes, with the UI generally being done in javascript. It's also used heavily for administrative purposes such as: - Operating system installer: http://fedoraproject.org/wiki/Anaconda - Software repository management: http://pulpproject.org/ - Software package installation: http://en.wikipedia.org/wiki/Ubuntu_Software_Center - Cloud computing: http://en.wikipedia.org/wiki/OpenStack You can write web applications that scale automatically on hosting services like: - Google App Engine: https://developers.google.com/appengine/ - OpenShift: http://openshift.redhat.com/ - Heroku: http://www.heroku.com/ In sum, python is used widely for a variety of purposes by some of the largest enterprises down to very small projects. Michael On Sun, Jul 29, 2012 at 12:01 PM, lipska the kat lip...@yahoo.co.uk wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group Many thanks Lipska -- Lipska the Kat: Troll hunter, sandbox destroyer and farscape dreamer of Aeryn Sun -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
How To AutoLogin to Website And Navigate thereafter
Can Some one help me or guide me the coding for automatic login to a website while keeping the session alive and navigating further into website for screen scraping using python. I understand the scraping part but unable to Understand the Login part using any of the Lib Urllib,Urlib2,BeautifulSoup,Mechanize,Re,requests,cookiejar etc Thanks for the help. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On 29/07/2012 17:01, lipska the kat wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group You are hard pushed to find anything here that's unacceptable, that's why I like reading this list so much. Many thanks Lipska There's a list of companies who use python on www.python.org top right of the page. You may have heard of one or two of them. -- Cheers. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
counting source lines (was: Is Python a commercial proposition ?)
lipska the kat, 29.07.2012 18:01: My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly ..jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python Just a comment on this part. An even easier way to count source lines is by using the tool SLOCCount. It also works with various languages. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Another common use is to create automated regression testing frameworks, and other automation tools. I see posting for python developers for this type of thing all the time on stack overflow careers. On Sun, Jul 29, 2012 at 11:43 AM, Mark Lawrence breamore...@yahoo.co.uk wrote: On 29/07/2012 17:01, lipska the kat wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group You are hard pushed to find anything here that's unacceptable, that's why I like reading this list so much. Many thanks Lipska There's a list of companies who use python on www.python.org top right of the page. You may have heard of one or two of them. -- Cheers. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors (was Re: Search and replace text in XML file?)
On 28/07/2012 16:51, Chris Angelico wrote: On Sat, Jul 28, 2012 at 6:29 PM, Mark Lawrence breamore...@yahoo.co.uk wrote: I highly recommend the use of notepad++. If anyone knows of a better text editor for Windows please let me know :) My current preference is SciTE, available on Linux and Windows both. It's configured using Lua, has lexers (and thus syntax highlighters and auto-indenters) for a huge list of languages (including Python, or I wouldn't mention it), and isn't RAM-hungry. It's not bug-free (but what isn't), and has a few limitations (eg it only really supports UTF-8), but I've found it excellent as both text editor and pseudo-IDE. ChrisA I use emacs, which is also available for windows (http://ftp.gnu.org/gnu/emacs/windows/ et al) As my work requires mixing between windows, various *NIXes, GUIs and terminals, having a common text editor across all is fantastically useful. ~Andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On 07/29/12 12:13, Michael Hrivnak wrote: - Operating system installer: http://fedoraproject.org/wiki/Anaconda - Software repository management: http://pulpproject.org/ - Software package installation: http://en.wikipedia.org/wiki/Ubuntu_Software_Center - Cloud computing: http://en.wikipedia.org/wiki/OpenStack I'll include both the Bazaar and Mercurial DVCS tools which are mostly Python (I understand some inner loops drop to C, but both have the option to fall back to a pure Python implementation). -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On 29/07/2012 17:01, lipska the kat wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. Python is used extensively in XenServer, although arguably more of a glue between components. The installer is entirely python, whereas the running product uses it more for scripts and toolstack plugins. Behind the scenes, our regression test framework is entirely python, which performs several thousand machine hours of tests a night, from simple tests such as verify the installer runs correctly and verify settings are preserved across upgrade from an older version to set up a pool of 4 servers, kill the master server (by removing its power), and verify that the remaining 3 fail over and one gets promoted to master ~Andrew I hope this is an acceptable question for this group Many thanks Lipska -- http://mail.python.org/mailman/listinfo/python-list
concurrent.futures vs gevent
Hi, It will be my first post here. I just found a great presentation here https://ep2012.europython.eu/conference/talks/concurrentfutures-is-here. As non native english, i can't fully understand all of the material presented there. I have some doubt, i hope someone here can give clarification. Could concurrent.futures be a (partly) replacement of gevent? I guess not, because gevent provide lightweight thread via greenlet, while concurrent.futures only provide multiprocessing across different processor) (not lightweight). Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Tim Chase, 29.07.2012 20:28: On 07/29/12 12:13, Michael Hrivnak wrote: - Operating system installer: http://fedoraproject.org/wiki/Anaconda - Software repository management: http://pulpproject.org/ - Software package installation: http://en.wikipedia.org/wiki/Ubuntu_Software_Center - Cloud computing: http://en.wikipedia.org/wiki/OpenStack I'll include both the Bazaar and Mercurial DVCS tools which are mostly Python (I understand some inner loops drop to C, but both have the option to fall back to a pure Python implementation). I find it perfectly reasonable to use C code (and other kinds of low-level code) in Python tools and applications. In fact, easy interfacing with low-level code is one of (C)Python's major selling points. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On 7/29/2012 12:01 PM, lipska the kat wrote: I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. Ever heard of a little startup called Google? It was built with C, Java, ... and Python. I believe Youtube is scripted in Python. Are applications generally written entirely in python or is it more often used for a subset of functionality. Even if the direct application is in Python, if it runs on CPython, it probably uses modules coded or re-coded in C, and it certainly used builtin functions and classes coded in C. The first 'killer app' for Python, in the 1990s, was its use as a glue language for interactive and batch scientific/numerical computation mostly done in compiled Fortran. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Michael Hrivnak schrieb: Python is used frequently on the server side of web applications for sites of all sizes, with the UI generally being done in javascript. Two large companies with lots of python code are dropbox and youtube: http://highscalability.com/blog/2011/3/14/6-lessons-from-dropbox-one-million-files-saved-every-15-minu.html http://highscalability.com/blog/2012/3/26/7-years-of-youtube-scalability-lessons-in-30-minutes.html It's also used heavily for administrative purposes such as: - Operating system installer: http://fedoraproject.org/wiki/Anaconda - Software repository management: http://pulpproject.org/ - Software package installation: http://en.wikipedia.org/wiki/Ubuntu_Software_Center - Cloud computing: http://en.wikipedia.org/wiki/OpenStack - Frameworks/tools like func, fabric or ipython are used in medium and large networks/clouds. - Python is also used a lot for admin tasks instead of shell scripts. - I know IBM WebSphere is not the favorite choice as an application server for most Java programmers *g*, but it uses Jython for the admin CLI. python and python based tools are used for engineering and scientific computing - some random examples: numpy, Sage, matplotlib, NetworkX. Regards, Bernd -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On Sunday, July 29, 2012 5:01:00 PM UTC+1, lipska the kat wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group Many thanks Lipska -- Lipska the Kat: Troll hunter, sandbox destroyer and farscape dreamer of Aeryn Sun If you check Google's job listings: http://www.google.com/about/jobs/teams/engineering/ On the software side of things you'll see very few listings that don't ask for coding in Python as a requirement or, at the very least, an advantageous skill to have. I'd say slowly, but surely, many people are coming around the fact that Python is not only as powerful as Java and other high-level languages, but it's also easier to read and write. That, and people (that I've spoken to, at least), find it far more fun to code in Python! -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Scripting is one of the strong sides of python. I use it al the time to quickly write a script to analyze something or automate. That is probably the reason it is used to glue (script) things together and is embedded in some programs (like Maya and such). At the company we're using python and django for websites, from small micro sites till big enterprise sites. Currently I'm working on a highly configurable application to control a maya render cluster. You can also use it for testing and even frontend testing. I think you can use python for almost everything, tough I think it's less suitable for non-web gui applications. lipska the kat lip...@yahoo.co.ukschreef: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. My most recent experience is with Java. The last project I was involved with included 6775 java source files containing 1,145,785 lines of code. How do I know this? because I managed to cobble together a python script that walks the source tree and counts the lines of code. It ignores block and line comments and whitespace lines so I'm fairly confident it's an accurate total. It doesn't include web interface files (mainly .jsp and HTML) or configuration files (XML, properties files and what have you). In fact it was remarkably easy to do this in python which got me thinking about how I could use the language in a commercial environment. I was first attracted to python by it's apparent 'Object Orientedness' I soon realised however that by looking at it in terms of the language I know best I wasn't comparing like with like. Once I had 'rebooted the bioware' I tried to approach python with an open mind and I have to say it's growing on me. The questions I have are ... How is python used in the real world. What sized projects are people involved with Are applications generally written entirely in python or is it more often used for a subset of functionality. I hope this is an acceptable question for this group Many thanks Lipska -- Lipska the Kat: Troll hunter, sandbox destroyer and farscape dreamer of Aeryn Sun -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Text editors
On 2012-07-29, Mark Lawrence breamore...@yahoo.co.uk wrote: Point taken, snag being I've never used any nix box in anger. This thread reminds of the good 'ole days when I were a lad using TPU on VMS. Have we got any VMS aficionados here? It's been a long time, but I used eve/tpu as my main editor for several years back when I did embedded SW development on VMS. I was an ex-Unix user, so I used DECShell a lot -- even though it was painfully slow. The entire Unix philosophy is based on the assumption that process creation is inexpensive, and I was told process creation on VMS was _very_ expensive, so Bourne shell scripts that would have taken second under Unix took minutes under VMS. -- Grant -- http://mail.python.org/mailman/listinfo/python-list
ANN: pathlib 0.7
Hello, pathlib 0.7 has been released with the following changes: - Add '**' (recursive) patterns to Path.glob(). - Fix openat() support after the API refactoring in Python 3.3 beta1. - Add a *target_is_directory* argument to Path.symlink_to() pathlib offers a set of classes to handle filesystem paths. It offers the following advantages over using string objects: * No more cumbersome use of os and os.path functions. Everything can be done easily through operators, attribute accesses, and method calls. * Embodies the semantics of different path types. For example, comparing Windows paths ignores casing. * Well-defined semantics, eliminating any warts or ambiguities (forward vs. backward slashes, etc.). PyPI download page at http://pypi.python.org/pypi/pathlib/ Documentation at http://pathlib.readthedocs.org/en/latest/ Code and issue tracker at https://bitbucket.org/pitrou/pathlib/ Regards Antoine Pitrou. -- Software development and contracting: http://pro.pitrou.net -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Michael Hrivnak wrote: Python is used frequently on the server side of web applications for sites of all sizes, with the UI generally being done in javascript. There is no javascript. -- PointedEars Please do not Cc: me. / Bitte keine Kopien per E-Mail. -- http://mail.python.org/mailman/listinfo/python-list
simplified Python parsing question
as some folks may remember, I have been working on making Python and its tool base more accessible to disabled programmers. I've finally come up with a really simple technique which should solve 80% of the problem. What I need to figure out is how to find a spot in the code where a symbol exists and potentially, it's rough type (class name, instance, etc.). This is really a much bigger question that I want to get into right now but I'm looking just to build a demo to back up a storyboard plus video. When you are sitting on or in a name, you look to the left or look to the right what would you see that would tell you that you have gone past the end of that name. For example a = b + c if you are sitting on a, the boundaries are beginning of line and =, if you are sitting on b, the boundaries are = and +, if you are sitting on c, the boundaries are + and end of line. a call the region between those boundaries the symbol region. if this example is clear to you, what you suggest for a method of finding a whole statement, or a whole symbol region? note, doesn't have to be perfect or complete solution, just good enough to let me do a moderately complex demo and seek funding accessibility world to build a complete environment. I appreciate the help because I believe that once this is working, it'll make a significant difference in the ability for disabled programmers to write code again as well as be able to integrate within existing development team and their naming conventions. Looking forward to responses. --- eric first draft write up of technique https://docs.google.com/document/d/1In11apApKozw_UOPAhVz0ePqns72_6652Dra34xWp4E/edit -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Sent from my iPhone On Jul 29, 2012, at 12:07 PM, lipska the kat lip...@yahoo.co.uk wrote: Pythoners Firstly, thanks to those on the tutor list who answered my questions. I'm trying to understand where Python fits into the set of commonly available, commercially used languages of the moment. Python is a glue language much like Perl was 10 years ago. Until the GIL is fixed I doubt anyone will seriously look at Python as an option for large enterprise standalone application development. I work in financials and the majority of our apps are developed in C++ and Java yet all the tools that startup, deploy and conduct rigorous unit testing are implemented in Python or Shell scripts that wrap Python scripts. Python definitely has its place in the enterprise however not so much for serious stand alone app development. I'm starting to see Python used along side many statistical and analytical tools like R, SPlus, and Mathlab for back testing and prototype work, in a lot of cases I've seen quants and traders implement models in Python to back test and if successful converted to Java or C++. -- http://mail.python.org/mailman/listinfo/python-list
Extracting bit fields from an IEEE-784 float
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i 0x8000) 63
Questions:
1) Are there any known implementations or platforms where Python floats
are not C doubles? If so, what are they?
2) If the platform byte-order is reversed, do I need to take any special
action? I don't think I do, because even though the float is reversed, so
will be the bit mask. Is this correct?
3) Any other problems with the way I am doing this?
Thanks in advance,
Steven
--
http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On 7/29/2012 7:12 PM, Rodrick Brown wrote: Python is a glue language much like Perl was 10 years ago. Until the GIL is fixed I doubt anyone will seriously look at Python as an option for large enterprise standalone application development. The GIL is neither a bug to be fixed nor an inherent part of the language. It is a design choice for CPython. There are reasons the CPython devs have no intention of removing the GIL (at least in the near future). A recent outline of these reasons (written by one of the CPython devs) is here: http://python-notes.boredomandlaziness.org/en/latest/python3/questions_and_answers.html#but-but-surely-fixing-the-gil-is-more-important-than-fixing-unicode -- CPython 3.3.0b1 | Windows NT 6.1.7601.17803 -- http://mail.python.org/mailman/listinfo/python-list
PyPI question, or, maybe I'm just stupid
I've been making some minor updates to the PollyReports module I announced a while back, and I've noticed that when I upload it to PyPI, my changelog (CHANGES.txt) doesn't appear to be integrated into the site at all. Do I have to put the changes into the README, or have I missed something here? It seems that there should be some automatic method whereby PyPI users could easily see what I've changed without downloading it first. -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting bit fields from an IEEE-784 float
On 2012-07-30 at 00:44:04 +,
Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote:
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i 0x8000) 63
3) Any other problems with the way I am doing this?
No, but perhaps this would be clearer:
import math
sign = math.copysign(1.0, x)
There are solutions that use math.frexp, too, but IMO they're more
obtuse.
HTH,
Dan
--
http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On Sun, Jul 29, 2012 at 5:52 PM, Andrew Berg bahamutzero8...@gmail.comwrote: On 7/29/2012 7:12 PM, Rodrick Brown wrote: Python is a glue language much like Perl was 10 years ago. Until the GIL is fixed I doubt anyone will seriously look at Python as an option for large enterprise standalone application development. The GIL is neither a bug to be fixed nor an inherent part of the language. It is a design choice for CPython. There are reasons the CPython devs have no intention of removing the GIL (at least in the near future). A recent outline of these reasons (written by one of the CPython devs) is here: http://python-notes.boredomandlaziness.org/en/latest/python3/questions_and_answers.html#but-but-surely-fixing-the-gil-is-more-important-than-fixing-unicode It's a nice document, though it seems to use the phrase shared memory in a novel (to me) way, and literally says that multiprocessing doesn't use shared memory even though it does (at least in the sense of the phrase that I'm accustomed to). I suppose you could call what I usually refer to as shared memory, instead System V shared memory. It's hidden from the user to a large extent, but when multiprocessing passes objects from one process to another, I believe it's doing so via System V shared memory. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
On Jul 29, 2012, at 8:54 PM, Andrew Berg bahamutzero8...@gmail.com wrote: On 7/29/2012 7:12 PM, Rodrick Brown wrote: Python is a glue language much like Perl was 10 years ago. Until the GIL is fixed I doubt anyone will seriously look at Python as an option for large enterprise standalone application development. The GIL is neither a bug to be fixed nor an inherent part of the language. It is a design choice for CPython. There are reasons the CPython devs have no intention of removing the GIL (at least in the near future). A recent outline of these reasons (written by one of the CPython devs) is here: http://python-notes.boredomandlaziness.org/en/latest/python3/questions_and_answers.html#but-but-surely-fixing-the-gil-is-more-important-than-fixing-unicode Hence the reason why no one will seriously look at Python for none glue work or simple web apps. When it comes to designing complex applications that need to exploit large multicore systems Python just isn't an option. Its still not possible to be a pure Python developer and find gainful employment today. -- CPython 3.3.0b1 | Windows NT 6.1.7601.17803 -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a commercial proposition ?
Rodrick Brown rodrick.br...@gmail.com writes: Hence the reason why no one will seriously look at Python for none glue work or simple web apps. When it comes to designing complex applications that need to exploit large multicore systems Python just isn't an option. That's wrong, I've run multicore apps in Python, by just using separate processes. There was no GIL issue, just separate processes for each core. The cpython interpreter is so slow that the GIL is usually not the bottleneck anyway. For lots of applications this just doesn't matter since the app is either not cpu-intensive or (in my case) all the work is done in native libraries. Its still not possible to be a pure Python developer and find gainful employment today. Certainly any serious programmer should be good in multiple languages, and in fact I got to write a little bit of C code at work a few months ago, but it wasn't really needed. The program is all Python. -- http://mail.python.org/mailman/listinfo/python-list
Re: simplified Python parsing question
On Sun, 29 Jul 2012 19:21:49 -0400, Eric S. Johansson wrote: When you are sitting on or in a name, you look to the left or look to the right what would you see that would tell you that you have gone past the end of that name. For example Have you read the docs? It gives full details of the Python syntax. http://docs.python.org/reference/index.html For example: http://docs.python.org/reference/simple_stmts.html#assignment-statements See also: http://docs.python.org/library/language.html http://effbot.org/zone/simple-top-down-parsing.htm http://nedbatchelder.com/text/python-parsers.html Here's a Python parser using the pyparsing library. It's a bit old (written for Python 2.4) but it shouldn't be hard to update it to new syntax: http://pyparsing.wikispaces.com/file/view/pythonGrammarParser.py -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: PyPI question, or, maybe I'm just stupid
Chris Gonnerman ch...@gonnerman.org writes: I've been making some minor updates to the PollyReports module Your post is showing up as a reply to a thread about IEEE-784 floats, because you created your message as a reply. Consequently, it's rather confusing why you suddenly start talking about PollyReports. If you want to attract attention to an unrelated topic, it's best if you don't reply to an existing thread; instead, start a new thread by composing a new message to the forum. -- \“I'd take the awe of understanding over the awe of ignorance | `\ any day.” —Douglas Adams | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting bit fields from an IEEE-784 float
On 7/29/2012 8:44 PM, Steven D'Aprano wrote:
I wish to extract the bit fields from a Python float, call it x. First I
cast the float to 8-bytes:
s = struct.pack('=d', x)
i = struct.unpack('=q', s)[0]
Then I extract the bit fields from the int, e.g. to grab the sign bit:
(i 0x8000) 63
Questions:
1) Are there any known implementations or platforms where Python floats
are not C doubles? If so, what are they?
CPython floats are C doubles, which should be IEEE doubles. Other
implementations have a different to probably the same thing.
2) If the platform byte-order is reversed, do I need to take any special
action? I don't think I do, because even though the float is reversed, so
will be the bit mask. Is this correct?
The math modules functions to disassemble floats will not care.
--
Terry Jan Reedy
--
http://mail.python.org/mailman/listinfo/python-list
ANN: visage (interfaces)
Hi, I just pushed this up to pypi/github, and I hoped to acquire some c.l.py opinions. It's experimental at this point, and might get scrapped. visage is a loosely coupled interface registry. weakrefs make it cake to implement. Basically, zope.interface, but where the interfaces are referenced by an identifier instead of the defining Interface class. Also, ABC registration is performed when the Interface becomes available so that isinstance/issubclass checks can be performed on Implementation instances/classes. FWICT, pyprotocols allows for something like this, but while introducing many interesting concepts. (; Currently, visage has no concept of adaption, but I'm suspecting that it could be built *on top* of the existing foundation. Personally, I'd prefer to reference interfaces by an identifier. Notably, the idea of having to pull in a dependency in order to perform local tests that have no need for the formal Interface class is reason enough for me to use something like this instead of the existing solutions. Sure, to each their own.? What's c.l.py's perspective on managing interfaces and implementations? Fuck it, ship it? =) -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: visage (interfaces)
On Sunday, July 29, 2012 10:18:23 PM UTC-7, jwp wrote: I just pushed this up to pypi/github, and I hoped to acquire some c.l.py opinions. http://github.com/jwp/py-visage -- http://mail.python.org/mailman/listinfo/python-list
[issue1692335] Fix exception pickling: Move initial args assignment to BaseException.__new__
Georg Brandl added the comment: Richard, can the issue be closed? -- priority: release blocker - critical ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1692335 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15295] Import machinery documentation
Nick Coghlan added the comment: General comment: runpy, pkgutil, et al should all get See Also links at the top pointing to the new import system section. Import system intro: As noted above, I suggest changing the name :) Opening section should refer to importlib.import_module(). Any mentions of __import__ should point out that its API is designed for the convenience of the interpreter, and thus it's a pain to use directly. However, we should also document explicitly that, unlike the import statement and calling __import__ directly, importlib.import_module will ignore any module level replacements of __import__. Replacing builtins.__import__ won't reliably override the entire import system (due to module level __import__ definitions, most notably importlib.__import__) and other tools that work with the process global import state directly (e.g. pkgutil, runpy). 5.1 Packages: Don't tease readers, just tell them: the defining characteristic of a package is that it is a module object with a __path__ attribute. Since we have the privilege of defining *the* standard terminology for old-style packages, I suggest we use the term initialised packages (since having an __init__.py is what makes them special). We should also note explicitly that an initialised package can also behave as a namespace package, by setting __path__ appropriately in __init__.py Also, I suggest adding a 5.1.3 Package Example subheading - currently you define an initialised package under the namespace package heading Finally, I think this section needs to explicitly define the terms *import path* and *path entry*. The meta path docs later refer to find_module() accepting a module name and path, and the reader could be forgiven for thinking that meant a filesystem path, when it is actually an import path (which is a sequence of path entries, which may themselves by filesystem paths). 5.2.2 Finders and loaders: The term sys path finder is incorrect as registered path hooks are invoked for both sys.path entries *and* package __path__ entries. I suggest path entry finder. (I agree a longer name is needed to better distinguish them from metapath finders) 5.2.3 Import hooks: While it does get cleared up in 5.2.4, this section could be clearer that the hooks *cannot* override the initial check of the module cache. 5.3.4 Metapath: See above comment about clarifying that an import path is passed to find_module() rather than a filesystem path. The description of the path importer is incorrect. It only knows how to scan an import path and interrogate the path hooks. It's the individual path entry finders that know how to do things like load modules from the filesystem or zip files. 5.2.5 Meta path loaders I don't like the title here. There's no such thing as a meta path loader. there are only module loaders. Once they're created, it doesn't matter how you found them. Clarify that the loader only has to remove the modules it inserted itself. Other modules that were loaded *successfully* as a side effect of the code execution will remain in the cache. 5.3 The Path Importer As noted above, the path importer is *NOT* restricted to filesystem imports. All it cares about is arbitrary text sequences and path hooks. With the right path hook, you could use URLs or database connection strings as path entries. 5.5 References I'd also point to PEP 328 (absolute imports by default and explicit relative import syntax) and PEP 338 (using the import system to find __main__) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15295 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15295] Import machinery documentation
Nick Coghlan added the comment: Great start here Barry, I'll switch my checkout over to read/write access and start contributing fixes. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15295 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15295] Import machinery documentation
Nick Coghlan added the comment: Pushed the import machinery - import system change (which hopefully won't break Barry's world) Also merged in a more recent version of trunk. This probably screwed up the default branch in this clone, but the clone should be done after these docs updates. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15295 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Serhiy Storchaka added the comment: Patches updated. Simplified struct __sizeof__ testing for 2.7 and 3.2 and fixed (using 'n' for Py_ssize_t) for 3.3. -- nosy: +meador.inge Added file: http://bugs.python.org/file26561/sizeof_tests-3.3_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Changes by Serhiy Storchaka storch...@gmail.com: Added file: http://bugs.python.org/file26562/sizeof_tests-3.2_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Changes by Serhiy Storchaka storch...@gmail.com: Added file: http://bugs.python.org/file26563/sizeof_tests-2.7_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Changes by Serhiy Storchaka storch...@gmail.com: Removed file: http://bugs.python.org/file26541/sizeof_tests-3.3.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Changes by Serhiy Storchaka storch...@gmail.com: Removed file: http://bugs.python.org/file26542/sizeof_tests-3.2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15467] Updating __sizeof__ tests
Changes by Serhiy Storchaka storch...@gmail.com: Removed file: http://bugs.python.org/file26543/sizeof_tests-2.7.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15467 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14803] Add feature to allow code execution prior to __main__ invocation
Nick Coghlan added the comment: I've switched back to being -1 on the PYTHONRUNFIRST idea. There are no ACLs for environment variables, so the security implications scare me too much for me to support the feature. The simple -C option doesn't have that problem, though, and could be used as infrastructure in a process infrastructure framework to provide enhanced configuration of Python subprocesses. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14803 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Changes by Nick Coghlan ncogh...@gmail.com: -- nosy: +ncoghlan ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: Added patch with test cases for the situations Amaury picked up, as well another I noticed (when the from clause refers to a module that fails) -- Added file: http://bugs.python.org/file26564/issue15425_test_cases.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: I actually did start refactoring a lot of this when I was working on the pkgutil changes, but stopped because that patch was already hairy enough. Maybe I should have kept going... -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: I think tuning the what frames to hide heuristic is a better bet - I remember know that the real reason I stopped messing with which exceptions were thrown was that I ended up confusing pkgutil. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: Fixed test case patch - previous one included a comment from when my test was buggy. -- Added file: http://bugs.python.org/file26565/issue15425_test_cases.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Changes by Nick Coghlan ncogh...@gmail.com: Removed file: http://bugs.python.org/file26564/issue15425_test_cases.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Amaury Forgeot d'Arc added the comment: I like the concept of exit points that Antoine introduced with a special method name. Maybe we coule generalize this and have a execute_and_hide_frames(func, *args, **kwargs) that is recognized by the caller in import.c. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12834] memorview.to_bytes() and PyBuffer_ToContiguous() incorrect for non-contiguous arrays
Stefan Krah added the comment: Christian's posts and my initial report were about memoryview.tobytes(). It's good that you changed the title: memoryview.tobytes() is more meaningful than the slightly obscure PyBuffer_ToContiguous(). BTW, I'm sure that PyBuffer_FromContiguous() and PyObject_CopyData() have the same problem, but they aren't used in the Python source tree and they are undocumented. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12834 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15477] test_cmath failures on OS X 10.8
Mark Dickinson added the comment: These types of run-time tests based on configure-time tests are problematic for binary installations of Python, like the OS X installers. Understood. I'm wondering how to fix this for Python, given that we're unlikely to see an OS-level fix for a while. There's an easy workaround, namely to add an if (x == 0.0) return x; before any use of the system log1p; the issue is how and when to apply this workaround. One option is always to apply the workaround, but this feels to me as though it's unnecessarily penalising those OSs that get it right; maybe just always apply the workaround on OS X? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15477 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: OK, to investigate the failures a bit further, I turned off the traceback suppression altogether by sticking an immediate return at the start of remove_importlib_frames. For the three failing tests, this is what I got when adding a traceback.print_tb call: test_broken_from (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 890, in test_broken_from from _parent_foo import bar File frozen importlib._bootstrap, line 1572, in _handle_fromlist File frozen importlib._bootstrap, line 1524, in _find_and_load File frozen importlib._bootstrap, line 1491, in _find_and_load_unlocked File frozen importlib._bootstrap, line 571, in _check_name_wrapper File frozen importlib._bootstrap, line 1002, in load_module File frozen importlib._bootstrap, line 983, in load_module File frozen importlib._bootstrap, line 547, in module_for_loader_wrapper File frozen importlib._bootstrap, line 853, in _load_module File frozen importlib._bootstrap, line 860, in _exec_module File ./_parent_foo/bar.py, line 1, in module 1/0 FAIL test_broken_parent (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 902, in test_broken_parent import _parent_foo.bar File frozen importlib._bootstrap, line 1524, in _find_and_load File frozen importlib._bootstrap, line 1475, in _find_and_load_unlocked File frozen importlib._bootstrap, line 1524, in _find_and_load File frozen importlib._bootstrap, line 1491, in _find_and_load_unlocked File frozen importlib._bootstrap, line 571, in _check_name_wrapper File frozen importlib._bootstrap, line 1002, in load_module File frozen importlib._bootstrap, line 983, in load_module File frozen importlib._bootstrap, line 547, in module_for_loader_wrapper File frozen importlib._bootstrap, line 853, in _load_module File frozen importlib._bootstrap, line 860, in _exec_module File ./_parent_foo/__init__.py, line 1, in module 1/0 FAIL test_syntax_error (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 851, in test_syntax_error import foo File frozen importlib._bootstrap, line 1524, in _find_and_load File frozen importlib._bootstrap, line 1491, in _find_and_load_unlocked File frozen importlib._bootstrap, line 571, in _check_name_wrapper File frozen importlib._bootstrap, line 1002, in load_module File frozen importlib._bootstrap, line 983, in load_module File frozen importlib._bootstrap, line 547, in module_for_loader_wrapper File frozen importlib._bootstrap, line 838, in _load_module File frozen importlib._bootstrap, line 960, in get_code FAIL And here's what I get with my patched version enabled (which also ignores chunks ending with get_code when the failure is a syntax error): test_broken_from (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 890, in test_broken_from from _parent_foo import bar File frozen importlib._bootstrap, line 1572, in _handle_fromlist File ./_parent_foo/bar.py, line 1, in module 1/0 FAIL test_broken_parent (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 902, in test_broken_parent import _parent_foo.bar File frozen importlib._bootstrap, line 1524, in _find_and_load File frozen importlib._bootstrap, line 1475, in _find_and_load_unlocked File ./_parent_foo/__init__.py, line 1, in module 1/0 FAIL test_syntax_error (test.test_import.ImportTracebackTests) ... File /home/ncoghlan/devel/py3k/Lib/test/test_import.py, line 851, in test_syntax_error import foo FAIL -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: I realised that it is my test that was wrong in the syntax error case. Attached patch includes the test cases, and the fix for that case. The weird thing that still requires an explanation is why the chunks in the first two cases are only being partially stripped. Those blocks end with _exec_module, yet a couple of frames are being left in the traceback. Current patch includes my debugging output from those tests. -- Added file: http://bugs.python.org/file26566/issue15425_handle_syntax_error.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15268] curses configure checks fail if only /usr/include/ncursesw/curses.h is installed
Roumen Petrov added the comment: Matthias, do not use hack if cross-build -- nosy: +rpetrov Added file: http://bugs.python.org/file26567/4-CROSS-avoid-ncursesw-include-path-hack.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15268 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15483] CROSS: initialise include and library paths in setup.py
New submission from Roumen Petrov: In setup.py inc_dirs and lib_dirs are not initialized in cross-build case. -- files: 1-CROSS-initialise-include-and-library-paths.patch keywords: patch messages: 166733 nosy: rpetrov priority: normal severity: normal status: open title: CROSS: initialise include and library paths in setup.py Added file: http://bugs.python.org/file26568/1-CROSS-initialise-include-and-library-paths.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15483 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15484] CROSS: use _PYTHON_PROJECT_BASE in distutils sysconfig
New submission from Roumen Petrov: Same as sysconfig but now in distutils _PYTHON_PROJECT_BASE has to be used in cross-build environment. -- components: Build files: 2-CROSS-use-_PYTHON_PROJECT_BASE-in-distutils-sysconfig.patch keywords: patch messages: 166734 nosy: rpetrov priority: normal severity: normal status: open title: CROSS: use _PYTHON_PROJECT_BASE in distutils sysconfig versions: Python 3.3 Added file: http://bugs.python.org/file26569/2-CROSS-use-_PYTHON_PROJECT_BASE-in-distutils-sysconfig.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15484 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: Ah, it turns out the three problem children are those which accept an import_ callback, which is set to builtins.__import__ when accessed via the import statement. This means we end up making a *recursive* call to PyImport_ImportModuleLevelObject, which calls remove_importlib_frames. The inner section of the trace gets stripped away, thus the _exec_module frame is already gone by the time the outer frames get added to the traceback. For the moment, I'm just going to adopt the blunt instrument approach and special case those three functions (including them in the always strip category). If anyone else comes up with a more elegant mechanism to deal with the recursion, we can switch to it later. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15484] CROSS: use _PYTHON_PROJECT_BASE in distutils sysconfig
Roumen Petrov added the comment: Also _PYTHON_PROJECT_BASE should be initialized to build directory by configure - low priority as other issue prevent python to be build and tested smoothly outside source tree. -- Added file: http://bugs.python.org/file26570/2-CROSS-set-_PYTHON_PROJECT_BASE-to-current-build-dir.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15484 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15485] CROSS: append gcc library search paths
New submission from Roumen Petrov: Currently if cross-build add_gcc_paths use append_dir_to_list but later prepend library paths. As result gcc is multilib 64-bit libraries will be found first before 32-bit one. -- components: Cross-Build files: 3-CROSS-append-gcc-library-search-paths.patch keywords: patch messages: 166737 nosy: rpetrov priority: normal severity: normal status: open title: CROSS: append gcc library search paths versions: Python 3.3 Added file: http://bugs.python.org/file26571/3-CROSS-append-gcc-library-search-paths.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15485 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15482] __import__() change between 3.2 and 3.3
Martin v. Löwis added the comment: So should 3.2 be changed to adjust the default value to match the documentation? -- nosy: +loewis ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15482 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12834] memoryview.to_bytes() and PyBuffer_ToContiguous() incorrect for non-contiguous arrays
Changes by Nick Coghlan ncogh...@gmail.com: -- title: memorview.to_bytes() and PyBuffer_ToContiguous() incorrect for non-contiguous arrays - memoryview.to_bytes() and PyBuffer_ToContiguous() incorrect for non-contiguous arrays ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12834 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15484] CROSS: use _PYTHON_PROJECT_BASE in distutils sysconfig
Changes by Roumen Petrov bugtr...@roumenpetrov.info: -- components: +Cross-Build -Build type: - compile error ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15484 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15483] CROSS: initialise include and library paths in setup.py
Changes by Roumen Petrov bugtr...@roumenpetrov.info: -- components: +Cross-Build versions: +Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15483 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: I'll at least introduce a _recursive_import exit point to simplify handling of those three cases. For those, if there isn't another importlib frame on the stack below them, odds are pretty good that it has been stripped already. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3754] cross-compilation support for python build
Roumen Petrov added the comment: I hope that following separate issues will address remaining part of this patch: required: - 15483: initialise include and library paths in setup.py - 15484: use _PYTHON_PROJECT_BASE in distutils sysconfig - TODO: typo in in configure.in - use ac_cv_pthread instead ac_cv_thread - 15268: skip curses configure checks fail if only /usr/include/ncursesw/curses.h is installed optional: - 15298: _sysconfigdata is generated in srcdir, not builddir - 14598: _cursesmodule.c fails with ncurses-5.9 on Linux reported first as 14438 - _cursesmodule build fails on cygwin and all other that allow python to be build smoothly outside source directory -- components: +Cross-Build -Build, Distutils2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3754 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3871] cross and native build of python for mingw32 with packaging
Roumen Petrov added the comment: May be patch 20120729 cannot be applied as my source tree contain a number of patches related to cross build - see msg166740 from issue 3754 . -- Added file: http://bugs.python.org/file26572/python-py3k-20120729-MINGW.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3871 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: I think the implementation I just checked in is close to being as simple as we can get: Blocks ending in _exec_module and _recursive_import are trimmed unconditionally For SyntaxError, it also trims blocks ending in get_code For ImportError, it trims everything involving importlib Because the latter two are conditional on the kind of exception thrown, it's only the first two that could be unified and I think keeping the two distinct checks is actually clearer in that case. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Roundup Robot added the comment: New changeset 75a30a478dc7 by Nick Coghlan in branch 'default': Close #15425: Eliminate more importlib related traceback noise http://hg.python.org/cpython/rev/75a30a478dc7 -- nosy: +python-dev resolution: - fixed stage: - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: On second thought, I realised having a general purpose hide this hook means that any future unconditional cases can easily be hidden just by changing from the normal call to a stripped call. I'll implement that now. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15486] Standardise the mechanisms for stripping importlib frames
New submission from Nick Coghlan: Thanks to issue #15425, the number of special cases in the importlib frame stripping is growing. This patch tweaks the frame stripping mechanism to make it easy to selectively strip frames in importlib._bootstrap by creating a _call_with_frames_removed helper function. The rules in remove_importlib_frames then change to remove any sequence of importlib frames which ends with that helper and all importlib frames in the ImportError case. -- messages: 166745 nosy: ncoghlan priority: normal severity: normal status: open title: Standardise the mechanisms for stripping importlib frames ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15486 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15425] Another strange Tracebacks with importlib
Nick Coghlan added the comment: Seeing as the blocker is dealt with for beta2, see #15486 for the proposed refactoring. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15425 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14803] Add feature to allow code execution prior to __main__ invocation
Antoine Pitrou added the comment: I've switched back to being -1 on the PYTHONRUNFIRST idea. There are no ACLs for environment variables, so the security implications scare me too much for me to support the feature. I'm quite sure PYTHONHOME and PYTHONPATH already allow you to mess quite freely. That's why we have the -E flag. I'm -0.5 myself, though, for the reason that it complicates the startup process a little bit more, without looking very compelling. It smells disturbingly like LD_PRELOAD to me. The simple -C option doesn't have that problem, though, and could be used as infrastructure in a process infrastructure framework to provide enhanced configuration of Python subprocesses. What do you mean exactly? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14803 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15486] Standardised mechanism for stripping importlib frames from tracebacks
Nick Coghlan added the comment: In trying to find a new case that wasn't already covered by the test suite, I found an error which I'm not even sure should be an error. Doesn't 3.2 suppress failures that occur when attempting to implicitly cache the .pyc? Anyway, given the rest of the patch, trimming this traceback will be easy if we decide that's the right thing to do. -- components: +Interpreter Core, Library (Lib) keywords: +patch nosy: +amaury.forgeotdarc, brett.cannon, eric.snow, georg.brandl priority: normal - release blocker stage: - patch review title: Standardise the mechanisms for stripping importlib frames - Standardised mechanism for stripping importlib frames from tracebacks type: - behavior versions: +Python 3.3 Added file: http://bugs.python.org/file26573/issue15486_simplify_importlib_frame_removal.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15486 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15482] __import__() change between 3.2 and 3.3
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15482 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
