New submission from Stefan Müller:
Following situation
* python 2.7.6
* module loaded via a PEP302 loader.
* the loader has get_source(fullname)
* assigns a dummy string as a file: module.__file__ == "<mymodule>"
Then
inspect.getsource(module)
throws
IOError: could not get source code
I tired to track this down, and it seems to be caused by
linecache.updatecache(..) with has
if not filename or (filename.startswith('<') and filename.endswith('>')):
return []
at the beginning.
This seems too restrictive me. Without the 'if' it would try to read the file
from disk, and if that fails check if there is a loader, without a loader it
returns [], so there would not be any behaviour change for non-loader modules
if the 'if' was removed, only an additional disk access.
I suggest to remove the 'if'.
Workaround: Don't use '<>' for the dummy file name, but I've read somewhere
that those '<>' are a convention for such use-cases.
----------
components: Library (Lib)
messages: 207736
nosy: stefan.mueller
priority: normal
severity: normal
status: open
title: inspect.getsource(), P302 loader and '<..>' filenames
type: behavior
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue20205>
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