delegator.py 文件源码

def _expand_args(command):
    """Parses command strings and returns a Popen-ready list."""

    # Prepare arguments.
    if isinstance(command, STR_TYPES):
        splitter = shlex.shlex(command.encode('utf-8'))
        splitter.whitespace = '|'
        splitter.whitespace_split = True
        command = []

        while True:
            token = splitter.get_token()
            if token:
                command.append(token)
            else:
                break

        command = list(map(shlex.split, command))

    return command