def get(self, name, create=False):
        if not validate_chan(name):
            return None
        ch = self.ctx.channels.get(name, None)
        if ch and not create:
            return ch
        ch = Channel(name)
        ch.props_ts = self.ctx.current_ts
        self.ctx.channels[name] = ch
        return ch
dataset/ETHPy150Open mammon-ircd/mammon/mammon/channel.py/ChannelManager.get/operator `or` -> `and`