title: discord.py differentiate between two servers?
body: <p>Hi so I have a command for my bot <code>-set_event (event code)</code>. If that occurs on one server the change follows to another. I'm curious if there is a way to stop this from happening. Thanks.</p>
  <pre class="lang-py prettyprint-override"><code>    @commands.command()
      async def set_event(self, ctx, arg):
          global event_code
          event_code = arg.upper()
  </code></pre>