Don't import asyncpg prior to python 3.6

Continuing on 788ba204a43b37d28cc690138b83e6782f8a46da
make sure asyncpg doesn't get imported if version < 3.6.

Change-Id: Ic070a0c9d3656f7da7ce2eb85033968fc88a64b9

diff --git a/lib/sqlalchemy/dialects/postgresql/__init__.py b/lib/sqlalchemy/dialects/postgresql/__init__.py
index 2762a9971b60d8bf94ddb038553e81aa8e633a9f..92abcd124a3802904ab940226f7f6648915ba121 100644 (file)
--- a/lib/sqlalchemy/dialects/postgresql/__init__.py
+++ b/lib/sqlalchemy/dialects/postgresql/__init__.py
@@ -59,7 +59,7 @@ from .ranges import TSRANGE
 from .ranges import TSTZRANGE
 from ...util import compat
 
-if compat.py3k:
+if compat.py36:
     from . import asyncpg  # noqa
 
 base.dialect = dialect = psycopg2.dialect