[issue16737] Different behaviours in script run directly and via runpy.run_module
Isaiah Peng
report at bugs.python.org
Thu Oct 26 09:43:11 EDT 2017
Isaiah Peng <issaria at gmail.com> added the comment:
Not sure if it's stated before, this difference of behavior also has other effects, e.g.
$ python -m test.test_traceback
# Ran 61 tests in 0.449s
# FAILED (failures=5)
This is because the loader associated with the module get confused, it loaded the original module as the proper module and then the module changed name to __main__ but the loader is still associated with the old module name, so call to `get_source` fails.
$ cat > test_m.py
print(__loader__.get_source(__name__))
$ python -m test_m
# ImportError: loader for test_m cannot handle __main__
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nosy: +isaiah
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<https://bugs.python.org/issue16737>
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