HW1 Done

HW1_Stones/env/lib/python3.7/site-packages/matplotlib/compat/subprocess.py

@@ -0,0 +1,42 @@
+"""
+A replacement wrapper around the subprocess module, which provides a stub
+implementation of subprocess members on Google App Engine
+(which are missing in subprocess).
+
+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.
+"""
+import subprocess
+from matplotlib.cbook import warn_deprecated
+warn_deprecated(since='3.0',
+                name='matplotlib.compat.subprocess',
+                alternative='the python 3 standard library '
+                            '"subprocess" module',
+                obj_type='module')
+
+__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