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Fix subprocess.CalledProcessError on Google App Engine #2860

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merged 1 commit into from
Mar 8, 2014
Merged

Fix subprocess.CalledProcessError on Google App Engine #2860

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8 changes: 5 additions & 3 deletions lib/matplotlib/compat/subprocess.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,21 +18,25 @@

import subprocess

__all__ = ['Popen', 'PIPE', 'STDOUT', 'check_output']
__all__ = ['Popen', 'PIPE', 'STDOUT', 'check_output', 'CalledProcessError']


if hasattr(subprocess, 'Popen'):
Popen = subprocess.Popen
# Assume that it also has the other constants.
PIPE = subprocess.PIPE
STDOUT = subprocess.STDOUT
CalledProcessError = subprocess.CalledProcessError
else:
# In restricted environments (such as Google App Engine), these are
# non-existent. Replace them with dummy versions that always raise OSError.
def Popen(*args, **kwargs):
raise OSError("subprocess.Popen is not supported")
PIPE = -1
STDOUT = -2
# There is no need to catch CalledProcessError. These stubs cannot raise
# it. None in an except clause will simply not match any exceptions.
CalledProcessError = None


def _check_output(*popenargs, **kwargs):
Expand Down Expand Up @@ -75,5 +79,3 @@ def _check_output(*popenargs, **kwargs):
check_output = subprocess.check_output
else:
check_output = _check_output

CalledProcessError = subprocess.CalledProcessError