def join(self, channel):
        if channel in self._channels or channel in self._joining:
            return

        self._joining.append(channel)
        self.send_command("JOIN", channel)
Delete a key from the cache, failing silently.
dataset/ETHPy150Open ecdavis/pants/pants/contrib/irc.py/IRCClient.join--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/core/cache/backends/base.py/BaseCache.delete