Class lazy_attribute

source code

object --+
         |
        lazy_attribute

Decorator that will turn a method in a lazy attribute. The first time the attribute is accessed its value will be computed using the decorated method and then cached.

Example:

   class MyClass(object):

       @lazy_attribute
       def my_attribute(self):
           print "Computing"
           return 0

   obj = MyClass()
   print obj.my_attribute
   print obj.my_attribute

Output:

   Computing
   0
   0