def _help_command(command):

    if command in subcommand.default_subcommands():
        emitter.publish(default_command_documentation(command))
        return 0
    else:
        executable = subcommand.command_executables(command)
        return subprocess.call([executable, command, '--help'])
L{getWindowSize} gets the size of a terminal file descriptor.
dataset/ETHPy150Open dcos/dcos-cli/cli/dcoscli/help/main.py/_help_command--crossover with--dataset/ETHPy150Open twisted/imaginary/imaginary/test/test_runner.py/WindowSizing.test_getTerminalSize