Clean up most py3k compat

Change-Id: I8172fdcc3103ff92aa049827728484c8779af6b7

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/sqlalchemy/dialects/postgresql/array.py b/lib/sqlalchemy/dialects/postgresql/array.py
index 0cb574dac..614559035 100644
--- a/lib/sqlalchemy/dialects/postgresql/array.py
+++ b/lib/sqlalchemy/dialects/postgresql/array.py
@@ -374,12 +374,12 @@ class ARRAY(sqltypes.ARRAY):
             def process(value):
                 if value is None:
                     return value
-                # isinstance(value, util.string_types) is required to handle
+                # isinstance(value, str) is required to handle
                 # the case where a TypeDecorator for and Array of Enum is
                 # used like was required in sa < 1.3.17
                 return super_rp(
                     handle_raw_string(value)
-                    if isinstance(value, util.string_types)
+                    if isinstance(value, str)
                     else value
                 )