Strip only unicode control characters from messages

clients/twitch.py

@@ -1,6 +1,6 @@
 import functools
 import re
-import string
+import unicodedata
 
 import irc.bot
 
@@ -89,7 +89,7 @@ class TwitchClient(irc.bot.SingleServerIRCBot):
 
     def _process_message(self, connection, event):
         tags = {t['key']: t['value'] for t in event.tags}
-        message = ''.join([c for c in event.arguments[0] if c in string.printable])
+        message = ''.join([c for c in event.arguments[0] if not unicodedata.category(c).startswith('C')])
         message = message.rstrip()
         send_response = functools.partial(self._send_response, connection, event)
         for pattern, action in self.patterns + self.supported_commands: