TehKuh regex, rollback and print(exception) for waifu

nxy/plugins/useless.py

@@ -1,10 +1,12 @@
 # -*- coding: utf-8 -*-
 import random
+import re
 
 import irc3
 from docopt import Dict as DocOptDict
 from irc3.plugins.command import command
 from irc3.utils import IrcString
+from psycopg2 import Error
 
 from . import DatabasePlugin
 
@@ -23,17 +25,9 @@ class Useless(DatabasePlugin):
         'keep your woahs to yourself',
     )
 
-    ISP_HOSTS = (
-        'vodafone',
-        'telefonica',
-        'kabel',
-        'unity-media',
-    )
-
     @irc3.event(r'(?i)^:(?P<mask>\S+) JOIN :(?P<target>#\S+)$')
     def tehkuh(self, mask, target):
-        nick = IrcString(mask).nick
-        if 'TehKuh' in mask.lower() and self.ISP_HOSTS in mask.lower():
+        if re.search(r'(?i).*(tehkuh).*@.*(telefonica|vodafone|kabel|unity-media).*', mask):
             self.bot.privmsg(target, '{}: Bouncer'.format(nick))
 
     @irc3.event(r'(?i)^:\S+ PRIVMSG (?P<target>\S+) :.*(woah|whoa).*$')
@@ -112,6 +106,7 @@ class Useless(DatabasePlugin):
         if nick.startswith('='):
             waifu = nick[1:]
 
+            try:
                 self.cur.execute('''
                 insert into
                   users (nick, waifu)
@@ -123,6 +118,9 @@ class Useless(DatabasePlugin):
 
                 self.bot.notice(mask.nick, 'Waifu set to: {waifu}'
                                 .format(waifu=waifu))
+            except Error as ex:
+                print(ex)
+                self.con.rollback()
         else:
             self.cur.execute('''
             select