Call the actual commit function...

getter.py

@@ -48,7 +48,7 @@ while True:
    continue
 
   cur.execute("INSERT INTO tweets VALUES(%i,'%s','%s','%s',0)" % (twid,date.strftime("%Y-%m-%dT%H:%M:%S"),sender,comment))
-  cur.commit()
+  sql_conn.commit()
 
   savepoint = twid
 

tweeter.py

@@ -31,7 +31,7 @@ while True:
   try:
    api.update_status("@%s Es wär soweit... :)" % recipient, original)
    cur.execute("UPDATE tweets SET sent = 1 WHERE tweet_id = %i" % original)
-   cur.commit()
+   sql_conn.commit()
   except:
    pass