Assertion failure on hotshot.stats.load()

[Yang]

I created a simple test case showing the zope.interface problem. Just
pass the following file to profile.py (i.e. the 'profile' module in
your Python standard library, run as a standalone app). The culprit
*seems* to be Twisted. Any ideas? Thanks in advance.

#!/usr/bin/env python

"""
error i get:

Traceback (most recent call last):
  File "/home/yang/local/bin/profile.py", line 611, in ?
    run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
  File "/home/yang/local/bin/profile.py", line 72, in run
    prof = prof.run(statement)
  File "/home/yang/local/bin/profile.py", line 448, in run
    return self.runctx(cmd, dict, dict)
  File "/home/yang/local/bin/profile.py", line 454, in runctx
    exec cmd in globals, locals
  File "<string>", line 1, in ?
  File "/home/yang/proj/assorted/sandbox/trunk/src/py/profile.py", line 6, in ?
    class Cnl( object ):
  File "/opt/zope/lib/python/zope/interface/advice.py", line 132, in advise
    return callback(newClass)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
485, in _implements_advice
    classImplements(cls, *interfaces)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
462, in classImplements
    spec.declared += tuple(_normalizeargs(interfaces))
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1373, in _normalizeargs
    _normalizeargs(v, output)
  File "/opt/zope/lib/python/zope/interface/declarations.py", line
1372, in _normalizeargs
    for v in sequence:
TypeError: Error when calling the metaclass bases
    iteration over non-sequence

"""

from zope.interface import *
from twisted.internet import interfaces
class Cnl( object ):
    implements( interfaces.IPushProducer )

On 10/27/06, Yang fer7msb02-at-sneakemail.com |python|
<...> wrote:
> I fell back onto the old profile module, but got the following error
> when trying to use zope.interface. I am now without any way to profile
> my application.
>
> Traceback (most recent call last):
>   File "/home/yang/local/bin/profile.py", line 611, in ?
>     run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
>   File "/home/yang/local/bin/profile.py", line 72, in run
>     prof = prof.run(statement)
>   File "/home/yang/local/bin/profile.py", line 448, in run
>     return self.runctx(cmd, dict, dict)
>   File "/home/yang/local/bin/profile.py", line 454, in runctx
>     exec cmd in globals, locals
>   File "<string>", line 1, in ?
>   File "/.automount/nms.lcs.mit.edu/export/home/yang/proj/cartel/trunk/icedb/src/frontend/icedb-central.py",
> line 5, in ?
>     from icedb import *
>   File "/home/yang/local/lib/python2.4/site-packages/icedb/__init__.py",
> line 4, in ?
>     import cafnet
>   File "/home/yang/local/lib/python2.4/site-packages/cafnet/__init__.py",
> line 269, in ?
>     class Cnl( object ):
>   File "/opt/zope/lib/python/zope/interface/advice.py", line 132, in advise
>     return callback(newClass)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 485, in _implements_advice
>     classImplements(cls, *interfaces)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 462, in classImplements
>     spec.declared += tuple(_normalizeargs(interfaces))
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 1373, in _normalizeargs
>     _normalizeargs(v, output)
>   File "/opt/zope/lib/python/zope/interface/declarations.py", line
> 1372, in _normalizeargs
>     for v in sequence:
> TypeError: Error when calling the metaclass bases
>     iteration over non-sequence
>
> On 10/27/06, Yang fer7msb02-at-sneakemail.com |python|
> <...> wrote:
> > Note: I realize hotshot is obsoleted by cProfile, but 2.5 breaks
> > several packages I depend on. I'm using Python 2.4.3.
> >
> > I'm getting an AssertionError on "assert not self._stack" when calling
> > hotshot.stats.load() on my app's hotshot profile. The app consistently
> > causes hotshot to generate such a problematic profile, but I have no
> > idea what's causing it. Anybody know what's wrong?
> >
> > Here's the profile:
> >
> > http://www.filefactory.com/file/76fdbd/
> >
> > Potentially relevant bugs:
> >
> > http://sourceforge.net/tracker/index.php?func=detail&aid=900092&group_id=5470&atid=105470
> > http://sourceforge.net/tracker/index.php?func=detail&aid=1019882&group_id=5470&atid=105470
> >
> > Thanks in advance for any help.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
> --
> http://mail.python.org/mailman/listinfo/python-list
>