python - What is the difference between r'' and r'^$' in regex for Django URLs? -

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I have a urls.py file that has a line like this: 

  urlpatterns =   
 Why is it that when I change the middle line  url (r '^ $', include ('my_module.urls'))  this job does not do?  
 Is not this reged for the (empty) value?  
 
 
 
 whenever the Django  is included ()  ( django Conf.urls.include () ), it matches any part of that UPS to that point and sends the remaining string to the remaining URL for further processing. But  $  means that the URL has ended here, so there is no thing to cut in and send it after  $ .  
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