Brett Cannon added the comment:
So I think I have come up with a way to expose a new method that makes this
use-case doable and in a sane manner. Richard, let me know what you think so
that I know that this makes sense before I commit myself to the new method
(init_module_attrs())::
--- a/Lib/multiprocessing/forking.py Fri May 24 13:51:21 2013 +0200
+++ b/Lib/multiprocessing/forking.py Fri May 24 08:06:17 2013 -0400
@@ -449,7 +449,7 @@
elif main_name != 'ipython':
# Main modules not actually called __main__.py may
# contain additional code that should still be executed
- import imp
+ import importlib
if main_path is None:
dirs = None
@@ -460,16 +460,17 @@
assert main_name not in sys.modules, main_name
sys.modules.pop('__mp_main__', None)
- file, path_name, etc = imp.find_module(main_name, dirs)
+ # We should not try to load __main__
+ # since that would execute 'if __name__ == "__main__"'
+ # clauses, potentially causing a psuedo fork bomb.
+ loader = importlib.find_loader(main_name, path=dirs)
+ main_module = imp.new_module(main_name)
try:
- # We should not do 'imp.load_module("__main__", ...)'
- # since that would execute 'if __name__ == "__main__"'
- # clauses, potentially causing a psuedo fork bomb.
- main_module = imp.load_module(
- '__mp_main__', file, path_name, etc
- )
- finally:
- if file:
- file.close()
+ loader.init_module_attrs(main_module)
+ except AttributeError:
+ pass
+ main_module.__name__ = '__mp_main__'
+ code = loader.get_code(main_name)
+ exec(code, main_module.__dict__)
sys.modules['__main__'] = sys.modules['__mp_main__'] = main_module
----------
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17314>
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