broken A boolean that is True if the barrier is in the broken state.

Popen.stdin If the stdin argument was PIPE, this attribute is a writeable stream object as returned by

Namespace() Create a shared Namespace object and return a proxy for it.

start() Start the process’s activity. This must be called at most once per process object. It

Popen.returncode The child return code, set by poll() and wait() (and indirectly by communicate())

Popen.args The args argument as it was passed to Popen – a sequence of program arguments or else a single

is_alive() Return whether the process is alive. Roughly, a process object is alive from the

subprocess.check_output(args, *, stdin=None, stderr=None, shell=False, universal_newlines=False, timeout=None) Run command with

args The arguments used to launch the process. This may be a list or a string.

set_running_or_notify_cancel() This method should only be called by Executor implementations before executing the