useless: fix syntax warning

storage: shorten code

bot/storage.py

@@ -15,28 +15,26 @@ class DBConn:
 
     def _reconnect(self):
         self._con = psycopg2.connect(*self.args, **self.kwargs)
+        return self._con
 
     def commit(self, *args, **kwargs):
         try:
             return self._con.commit(*args, **kwargs)
         except psycopg2.InterfaceError:
-            self._reconnect()
-            return self._con.commit(*args, **kwargs)
+            return self._reconnect().commit(*args, **kwargs)
 
     def rollback(self, *args, **kwargs):
         try:
             return self._con.rollback(*args, **kwargs)
         except psycopg2.InterfaceError:
-            self._reconnect()
-            return self._con.rollback(*args, **kwargs)
+            return self._reconnect().rollback(*args, **kwargs)
 
     @contextlib.contextmanager
     def cursor(self, *args, **kwargs):
         try:
             yield self._con.cursor(cursor_factory=DictCursor, *args, **kwargs)
         except psycopg2.InterfaceError:
-            self._reconnect()
-            yield self._con.cursor(cursor_factory=DictCursor, *args, **kwargs)
+            yield self._reconnect().cursor(cursor_factory=DictCursor, *args, **kwargs)
 
 
 class Storage(Plugin):