subprocess.py 文件源码

def make_command(self, value):
        cmd = self.config.get('cmd')
        if value is None:
            return cmd,
        elif not cmd and isinstance(value, Sequence):
            return value
        elif not cmd and isinstance(value, str):
            return value,
        elif isinstance(cmd, list) and isinstance(value, str):
            return cmd + [value]
        elif isinstance(cmd, list) and isinstance(value, Sequence):
            result = list(cmd)
            result.extend(value)
            return result
        elif isinstance(cmd, list) and isinstance(value, Mapping):
            return [i.format_map(value) for i in cmd]
        elif isinstance(cmd, str) and isinstance(value, str):
            return self.config.cmd + ' ' + value,
        elif isinstance(cmd, str) and isinstance(value, Mapping):
            return self.config.cmd.format_map(value),
        elif isinstance(cmd, str) and isinstance(value, Sequence):
            return self.config.cmd.format(*value),
        else:
            raise ValueError(value)