Mobile Python-What Is Magic method

Source: Internet
Author: User
We often see a variety of methods that have been surrounded by double underscores, such as __init__, which are magic methods.

Magic method Python language to book a good "protocol", in different cases different magic methods, is implicitly called. We override these methods, and therefore manipulate various behaviors.

Class A (object):    def __str__ (self):        return ' I am a,2333 '    def __len__ (self):        return 42a = A () print a# output "I Am a,2333 "Print len (A) #输出42
You can see that the print statement implicitly calls the __str__ method, and Len () implicitly calls the __len__ method.

Python has ordered a rich magic method that allows us to fine-grained control of a variety of behaviors, use a variety of acid cool, many other magic methods see <python Magic Method Guide >



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Mobile Python-What Is Magic method

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