Question

从谷歌文档中获取此示例

class BrowseHandler(webapp.RequestHandler):

>     def get(self, category, product_id):
>         # Display product with given ID in the given category.
> 
> 
> # Map URLs like /browse/(category)/(product_id) to
> BrowseHandler. application =
> webapp.WSGIApplication([(r'/browse/(.*)/(.*)',
> BrowseHandler)
>                                      ],
>                                      debug=True)
> 
> def main():
>     run_wsgi_app(application)
> 
> if __name__ == '__main__':
>     main()

如何更改regx分组以便Product id是可选的

即，网址http://yourdomain.com/category将被发送到当前上述示例中的浏览处理程序，您必须添加产品ID或至少在类别之后添加

即

http://yourdomain.com/category/

R '/浏览/（）/（。）'

有什么想法吗？

Answer 1

您可以使用映射到同一处理程序的两个正则表达式：

class BrowseHandler(webapp.RequestHandler):

    def get(self, category, product_id=None):
        # Display product with given ID in the given category.


# Map URLs like /browse/(category)/(product_id) to
BrowseHandler. application =
webapp.WSGIApplication([(r'/browse/(.*)/(.*)', BrowseHandler),
                        (r'/browse/(.*)', BrowseHandler),
                       ], debug=True)

def main():
    run_wsgi_app(application)

if __name__ == '__main__':
    main()

Answer 2

尝试添加“？”在正则表达式结束之前：

r'/browse/(.)/(.)?'

使用WSGIAppl和正则表达式分组帮助所需的Google App引擎Url映射

2 个答案: