Comments on RFC7636 module.
+# -*- coding: utf-8 -*-
+"""
+ authlib.specs.rfc7636
+ ~~~~~~~~~~~~~~~~~~~~~
+
+ This module represents a direct implementation of
+ Proof Key for Code Exchange by OAuth Public Clients.
+
+ https://tools.ietf.org/html/rfc7636
+"""
+
+from .grant import AuthorizationCodeGrant
