/usr/lib/python2.7/dist-packages/matplotlib/compat/subprocess.py is in python-matplotlib 2.0.0+dfsg1-2.
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A replacement wrapper around the subprocess module, with a number of
work-arounds:
- Provides a stub implementation of subprocess members on Google App Engine
(which are missing in subprocess).
- Use subprocess32, backport from python 3.2 on Linux/Mac work-around for
https://github.com/matplotlib/matplotlib/issues/5314
Instead of importing subprocess, other modules should use this as follows:
from matplotlib.compat import subprocess
This module is safe to import from anywhere within matplotlib.
"""
from __future__ import absolute_import # Required to import subprocess
from __future__ import print_function
import os
import sys
if os.name == 'posix' and sys.version_info[0] < 3:
# work around for https://github.com/matplotlib/matplotlib/issues/5314
try:
import subprocess32 as subprocess
except ImportError:
import subprocess
else:
import subprocess
__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
check_output = subprocess.check_output
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")
def check_output(*args, **kwargs):
raise OSError("subprocess.check_output 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
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