Bugs item #417833, was opened at 2001-04-21 09:10 Message generated for change (Comment added) made by rturpin You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=417833&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: None Status: Open Resolution: None Priority: 5 Submitted By: Garth T Kidd (gtk) Assigned to: Ka-Ping Yee (ping) Summary: pydoc HTTP reload failure Initial Comment: pydoc, when run as a web server, can't cope with reloads of modules which use 'from Package import Module' syntax for imports. To reproduce: * extract the attached DemonstratePydocBug tarchive into your Python 2.1 directory * python -c Lib\pydoc.py -p 8192 * visit http://localhost:8192/DemonstratePydocBug.html The rest of the instructions are there. Demonstrated on Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32. Funnily enough, there's no problem with trying the following under Python interactively: Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> import DemonstratePydocBug.ReloadFails >>> import DemonstratePydocBug.ReloadFails >>> import DemonstratePydocBug.ReloadFails >>> import DemonstratePydocBug.ReloadFails Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> from DemonstratePydocBug import ReloadFails >>> from DemonstratePydocBug import ReloadFails >>> from DemonstratePydocBug import ReloadFails >>> from DemonstratePydocBug import ReloadFails I'm dropping additional debugging code into pydoc.py to see if I can figure out what's going on. ---------------------------------------------------------------------- Comment By: Russell Turpin (rturpin) Date: 2005-10-31 11:16 Message: Logged In: YES user_id=670280 There's a similar bug in Python 2.4. It causes the __import__ function to throw an AttributeError exception during safeimport(). I've patched our local copy of pydoc to fix this. The patch is to the safeimport() function. The patched lines are: # This keeps __import__ from throwing an exception on reloads. # del sys.modules[path] # This is sole original line module = sys.modules[path] # Added this line try: # Added this line reload(module) # Added this line except: # Added this line module = None # Added this line return module # Added this line This replaces the line: del sys.modules[path] ---------------------------------------------------------------------- Comment By: Eddie Parker (eparker) Date: 2004-08-31 16:41 Message: Logged In: YES user_id=991512 This is still current, as of 08/31/2004. Rather annoying, too. :( ---------------------------------------------------------------------- Comment By: Brett Cannon (bcannon) Date: 2003-05-16 18:43 Message: Logged In: YES user_id=357491 Just as an update, this still seeems to be an issue in Python 2.3b1 w/ version 1.82 of pydoc ---------------------------------------------------------------------- Comment By: Garth T Kidd (gtk) Date: 2001-04-21 11:15 Message: Logged In: YES user_id=59803 Using pydoc in the interpreter doesn't tickle any of these bugs, so hopefully I can narrow my focus down to the difference in handling between serve() and help(). Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> import pydoc >>> pydoc.help Welcome to Python 2.1! This is the online help utility. [...] help> modules Please wait a moment while I gather a list of all available modules... [list of modules] Enter any module name to get more help. Or, type "modules spam" to search for modules whose descriptions contain the word "spam". help> DemonstratePydocBug.ReloadFails Help on module DemonstratePydocBug.ReloadFails in DemonstratePydocBug: NAME DemonstratePydocBug.ReloadFails FILE c:\python21\lib\demonstratepydocbug\reloadfails.py [...] help> DemonstratePydocBug.TryThis Help on module DemonstratePydocBug.TryThis in DemonstratePydocBug: NAME DemonstratePydocBug.TryThis [...] ---------------------------------------------------------------------- Comment By: Garth T Kidd (gtk) Date: 2001-04-21 10:09 Message: Logged In: YES user_id=59803 Yet another demonstration case: DemonstratePydocBug/TryThis.py: import DemonstratePydocBug.Target Target = DemonstratePydocBug.Target This gives us a local Target variable, same as 'from DemonstratePydocBug import Target'. Pydoc barfs on this on the very first load. The traceback I hacked into pydoc claims: Traceback (most recent call last): File "C:\Python21\Lib\pydoc.py", line 223, in safeimport module = __import__(path) File "c:\python21\lib\DemonstratePydocBug\TryThis.py", line 9, in ? Target = DemonstratePydocBug.Target AttributeError: 'DemonstratePydocBug' module has no attribute 'Target' In the interpreter, everything's fine with both techniques for getting Target: C:\Python21\thirdparty\MoinMoin>python Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> from DemonstratePydocBug import Target >>> Target <module 'DemonstratePydocBug.Target' from 'c:\python21 \lib\DemonstratePydocBug\Target.pyc'> >>> C:\Python21\thirdparty\MoinMoin>python Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> import DemonstratePydocBug.Target >>> Target = DemonstratePydocBug.Target >>> Target <module 'DemonstratePydocBug.Target' from 'c:\python21 \lib\DemonstratePydocBug\Target.pyc'> >>> ---------------------------------------------------------------------- Comment By: Garth T Kidd (gtk) Date: 2001-04-21 09:58 Message: Logged In: YES user_id=59803 WHOA. Belay that. I screwed up trying to run too many tests in a row without shutting down the interpreter. Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> import pydoc >>> import DemonstratePydocBug >>> pydoc.help(DemonstratePydocBug.Target) Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'DemonstratePydocBug' module has no attribute 'Target' Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. >>> import pydoc >>> import DemonstratePydocBug >>> DemonstratePydocBug.Target Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'DemonstratePydocBug' module has no attribute 'Target' >>> import DemonstratePydocBug.Target >>> DemonstratePydocBug.Target <module 'DemonstratePydocBug.Target' from 'c:\python21 \lib\DemonstratePydocBug\Target.pyc'> >>> pydoc.help(DemonstratePydocBug.Target) Help on module DemonstratePydocBug.Target: NAME DemonstratePydocBug.Target FILE c:\python21\lib\demonstratepydocbug\target.py DESCRIPTION Target: module to help demonstrate the pydoc reload bug. See the docstring in __init__.py for full details. Reloading the description of this module in pydoc should work, but that's hardly unusual because it doesn't import *anything*. Try ReloadWorks and ReloadFails, instead. DATA __file__ = r'c:\python21 \lib\DemonstratePydocBug\Target.pyc' __name__ = 'DemonstratePydocBug.Target' >>> pydoc.help(DemonstratePydocBug.Target) Help on module DemonstratePydocBug.Target: NAME DemonstratePydocBug.Target ... ---------------------------------------------------------------------- Comment By: Garth T Kidd (gtk) Date: 2001-04-21 09:55 Message: Logged In: YES user_id=59803 >>> import pydoc >>> import DemonstratePydocBug >>> pydoc.help(DemonstratePydocBug.Target) ... we get good stuff... >>> print DemonstratePydocBug.ReloadFails2 <module 'DemonstratePydocBug.ReloadFails2' from 'DemonstratePydocBug\ReloadFails2.py'> >>> pydoc.help(DemonstratePydocBug.ReloadFails2) ... we get good stuff... ---------------------------------------------------------------------- Comment By: Garth T Kidd (gtk) Date: 2001-04-21 09:43 Message: Logged In: YES user_id=59803 I've found another demonstration case. Noting that from package import module gives you a variable called 'module', whilst import package.module gives you a variable called 'package', I thought I'd try out another import syntax which wouldn't break code that was trying out the first option: import package.module as module This also works under the Python 2.1 interpreter but breaks pydoc 1.38. I've attached an updated demonstration tarchive. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=417833&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
