New submission from Brett Cannon:
As of right now, if you use imp.load_module(), it will store any 'file'
argument you give it in a hacked loader. That's a problem when you call
imp.reload() on such a module, though, as subsequent calls to
__loader__.load_module() will attempt to use the cached file object which was
closed on the initial load. What the code should do is use the hacked loader to
load the module, but then set an unhacked loader to __loader__ for reloads to
work properly.
Traceback below:
======================================================================
ERROR: test_source (test.test_imp.ReloadTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/build/work/cf49a3092a96daebb23bf3c6e0d86ac9/google3/tmp/lib/python3.3/test/test_imp.py",
line 248, in test_source
imp.reload(os)
File
"/build/work/cf49a3092a96daebb23bf3c6e0d86ac9/google3/tmp/lib/python3.3/imp.py",
line 252, in reload
return module.__loader__.load_module(name)
File "<frozen importlib._bootstrap>", line 586, in _check_name_wrapper
File "<frozen importlib._bootstrap>", line 1023, in load_module
File "<frozen importlib._bootstrap>", line 1004, in load_module
File "<frozen importlib._bootstrap>", line 562, in module_for_loader_wrapper
File "<frozen importlib._bootstrap>", line 854, in _load_module
File "<frozen importlib._bootstrap>", line 978, in get_code
File
"/build/work/cf49a3092a96daebb23bf3c6e0d86ac9/google3/tmp/lib/python3.3/imp.py",
line 88, in get_data
with self.file:
ValueError: I/O operation on closed file.
----------
components: Library (Lib)
keywords: easy
messages: 183549
nosy: brett.cannon
priority: normal
severity: normal
stage: test needed
status: open
title: imp.load_module() leads to the improper caching of the 'file' argument
versions: Python 3.3, Python 3.4
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17358>
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