update sqlalchemy

lib/python3.5/site-packages/sqlalchemy/engine/url.py

@@ -1,5 +1,5 @@
 # engine/url.py
-# Copyright (C) 2005-2014 the SQLAlchemy authors and contributors
+# Copyright (C) 2005-2016 the SQLAlchemy authors and contributors
 # <see AUTHORS file>
 #
 # This module is part of SQLAlchemy and is released under
@@ -105,11 +105,25 @@ class URL(object):
             self.database == other.database and \
             self.query == other.query
 
-    def get_dialect(self):
-        """Return the SQLAlchemy database dialect class corresponding
-        to this URL's driver name.
-        """
+    def get_backend_name(self):
+        if '+' not in self.drivername:
+            return self.drivername
+        else:
+            return self.drivername.split('+')[0]
 
+    def get_driver_name(self):
+        if '+' not in self.drivername:
+            return self.get_dialect().driver
+        else:
+            return self.drivername.split('+')[1]
+
+    def _get_entrypoint(self):
+        """Return the "entry point" dialect class.
+
+        This is normally the dialect itself except in the case when the
+        returned class implements the get_dialect_cls() method.
+
+        """
         if '+' not in self.drivername:
             name = self.drivername
         else:
@@ -125,6 +139,14 @@ class URL(object):
         else:
             return cls
 
+    def get_dialect(self):
+        """Return the SQLAlchemy database dialect class corresponding
+        to this URL's driver name.
+        """
+        entrypoint = self._get_entrypoint()
+        dialect_cls = entrypoint.get_dialect_cls(self)
+        return dialect_cls
+
     def translate_connect_args(self, names=[], **kw):
         """Translate url attributes into a dictionary of connection arguments.