don't markov-learn what looks like a command

markov/bot.py

@@ -1,6 +1,8 @@
 """Observe Markov chains from Discord."""
 import logging
 
+from django.conf import settings
+
 from bot import hitomi
 from markov import lib
 
@@ -15,6 +17,11 @@ def on_message(message):
         logger.debug("markov ignoring message authored by self")
         return
 
+    # ignore commands
+    if message.content[0] == settings.DISCORD_BOT_COMMAND_PREFIX:
+        logger.debug("markov ignoring message that looks like a command")
+        return
+
     if message.channel.is_private:
         # DMs have a context of the author
         context_name = message.author