Fixed a bug, view_args not values

flask/__init__.py

@@ -23,6 +23,7 @@ from .helpers import url_for, jsonify, json_available, flash, \
 from .globals import current_app, g, request, session, _request_ctx_stack
 from .ctx import has_request_context
 from .module import Module
+from .blueprints import Blueprint
 from .templating import render_template, render_template_string
 from .session import Session
 

flask/app.py

@@ -1043,7 +1043,7 @@ class Flask(_PackageBoundObject):
         if bp is not None and bp in self.url_value_preprocessors:
             funcs = chain(funcs, self.url_value_preprocessors[bp])
         for func in funcs:
-            func(request.endpoint, request.values)
+            func(request.endpoint, request.view_args)
 
         funcs = self.before_request_funcs.get(None, ())
         if bp is not None and bp in self.before_request_funcs: