class Popen(object):

_child_created = False # Set here since __del__ checks it

def __init__(self, args, bufsize=-1, executable=None,

stdin=None, stdout=None, stderr=None,

preexec_fn=None, close_fds=_PLATFORM_DEFAULT_CLOSE_FDS,

"""Create new Popen instance."""

_cleanup()

self._child_created = False

self._input = None

self._communication_started = False

if bufsize is None:

# Wait for the process to terminate, to avoid zombies.

self.wait()

def __del__(self, _maxsize=sys.maxsize, _active=_active):

# If __init__ hasn't had a chance to execute (e.g. if it

# was passed an undeclared keyword argument), we don't

# have a _child_created attribute at all.

if not getattr(self, '_child_created', False):

def __del__(self, _maxsize=sys.maxsize):

if not self._child_created:

# We didn't get to successfully create a child process.

return

# In case the child hasn't been waited on, check if it's done.

_WTERMSIG=os.WTERMSIG, _WIFEXITED=os.WIFEXITED,

_WEXITSTATUS=os.WEXITSTATUS):

# This method is called (indirectly) by __del__, so it cannot

# refer to anything outside of its local scope."""

# refer to anything outside of its local scope.

if _WIFSIGNALED(sts):

self.returncode = -_WTERMSIG(sts)

elif _WIFEXITED(sts):