Ezio Melotti added the comment:
> ./python -m test -v test_codecencodings_kr test_imp test_codeccallbacks
Thanks, I was trying to reproduce the failure yesterday with test_imp
test_codeccallbacks but it wasn't working -- now I can reproduce it.
My idea was to import html and html.parser and then remove them both, and
that's what the patch did:
>>> import sys
>>> m = set(sys.modules)
>>> from html import parser
>>> set(sys.modules) - m
{'html.parser', 'linecache', 'tokenize', 'warnings', '_markupbase', 'html',
'token'}
>>> del sys.modules['html']
>>> set(sys.modules) - m
{'html.parser', 'linecache', 'tokenize', '_markupbase', 'warnings', 'token'}
>>> del sys.modules['html.parser']
>>> set(sys.modules) - m
{'token', '_markupbase', 'tokenize', 'warnings', 'linecache'}
I think the problem is that if test_codecencodings_kr is run before test_imp,
test_imp deletes html and html.parser but leaves the html.entities imported by
test_codecencodings_kr, and when test_codeccallbacks tries to use it again it
fails:
>>> import sys
>>> m = set(sys.modules)
>>> import html.entities
>>> set(sys.modules) - m
{'html.entities', 'html'}
>>> from html import parser
>>> set(sys.modules) - m
{'_markupbase', 'html', 'html.entities', 'tokenize', 'html.parser',
'linecache', 'warnings', 'token'}
>>> del sys.modules['html']
>>> set(sys.modules) - m
{'_markupbase', 'tokenize', 'html.entities', 'token', 'html.parser',
'linecache', 'warnings'}
>>> del sys.modules['html.parser']
>>> set(sys.modules) - m
{'_markupbase', 'tokenize', 'html.entities', 'token', 'linecache', 'warnings'}
>>> html.entities
<module 'html.entities' from '/home/wolf/dev/py/py3k/Lib/html/entities.py'>
>>> import html.entities
>>> html.entities
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'entities'
A solution would be to remove all the modules that start with 'html.' (see
attached patch):
>>> import sys
>>> m = set(sys.modules)
>>> import html.entities
>>> from html import parser
>>> del sys.modules['html']
>>> del sys.modules['html.parser']
>>> set(sys.modules) - m
{'warnings', 'linecache', 'token', 'html.entities', 'tokenize', '_markupbase'}
>>> del sys.modules['html.entities']
>>> import html.entities
>>> html.entities
<module 'html.entities' from '/home/wolf/dev/py/py3k/Lib/html/entities.py'>
Another (possibly better) solution would be to copy sys.modules before messing
with it and restore it afterwards. I was looking in test.support for a context
manager to do it but I didn't find it, so I just deleted the modules I imported
manually.
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Python tracker <[email protected]>
<http://bugs.python.org/issue18706>
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