title: Send Message In Specific Channel In cogs discord.py
body: <p>i m trying to send a message in specific channel ...i know how to specify channel normally but i m getting very confused in cogs i m really not able to understand how to do so....any help is appreciated :)</p>
  <pre class="lang-py prettyprint-override"><code>@commands.Cog.listener()
      async def on_ready(ctx, channel:discord.Channel=None):
          channel = '785465306470547457'
          role = discord.utils.get(user.server.roles, name=&quot;Orange&quot;)
          message = await ctx.send_message(channel, &quot;React to me!&quot;)
          while True:
              reaction = await ctx.wait_for_reaction(emoji=&quot;&quot;, message=message)
              await ctx.add_roles(reaction.message.author, role)
  </code></pre>
  <p><strong>ERROR</strong></p>
  <pre><code>discord.ext.commands.errors.ExtensionFailed: Extension 'cogs.rolesystem' raised an error: AttributeError: module 'discord' has no attribute 'Channel'
  </code></pre>