update to python3.7

lib/python3.7/site-packages/sqlalchemy/dialects/postgres.py

@@ -0,0 +1,18 @@
+# dialects/postgres.py
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
+
+# backwards compat with the old name
+from sqlalchemy.util import warn_deprecated
+
+warn_deprecated(
+    "The SQLAlchemy PostgreSQL dialect has been renamed from 'postgres' to "
+    "'postgresql'. The new URL format is "
+    "postgresql[+driver]://<user>:<pass>@<host>/<dbname>"
+)
+
+from sqlalchemy.dialects.postgresql import *
+from sqlalchemy.dialects.postgresql import base