Remove superfluous cleanup conditions.

1 files changed, 1 insertions, 4 deletions

diff --git a/sqlparse/sql.py b/sqlparse/sql.py
index 92bf83e..77448d7 100644
--- a/sqlparse/sql.py
+++ b/sqlparse/sql.py
@@ -228,12 +228,9 @@ class TokenList(Token):
 
         If no matching token can be found ``None`` is returned.
         """
-        if isinstance(clss, (list, tuple)):
+        if not isinstance(clss, (list, tuple)):
             clss = (clss,)
 
-        if isinstance(clss, tuple):
-            clss = tuple(clss)
-
         for token in self.tokens[idx:]:
             if isinstance(token, clss):
                 return token