def __init__(self, command, *args, **kwargs):
        for arg in args[:-1]:
            if arg in u(" "):
                raise Error("Space can only appear in the very last arg")

        self.command = command
        self.args = list(filter(lambda x: x is not None, list(args)))
        self.prefix = text_type(kwargs["prefix"]) if "prefix" in kwargs else None

        self.encoding = kwargs.get("encoding", "utf-8")
        self.add_nick = kwargs.get("add_nick", False)
dataset/ETHPy150Open circuits/circuits/circuits/protocols/irc/message.py/Message.__init__/swapped operands of `in`