is_authenticated in django

• It's a method, not a property. 
• You need to call it:

         if u.is_authenticated():

• Of course, in a template, Django calls methods for you automatically.

• is_authenticated is a method, so you need some parentheses there. 

• Otherwise, u.is_authenticated is the function object, which is a True value.

• In the template language, functions with no arguments are evaluated as functions, so that's why you're good there.