Introduction to the _ init _ method function in the Python class, the Python class constructor, And the python _ init _

Introduction to the _ init _ method function in the Python class, the Python class constructor, And the python _ init _

If there is no _ init _ method function in a class, the instance object created using the class name is empty and is not initialized. If this method function is available, usually, as the first method function of the class, it is a bit like the constructor in C ++ and other languages.

Class Ca: def _ init _ (self, v): # Pay attention to the two underlines (self) before and after each. name = vdef pr (self): print "a --->", self. nameia = Ca ("Jeapedu") # essentially calls the _ init _ method function ia. pr () Ca. pr (ia)

Output result
A ---> Jeapedu

A ---> Jeapedu

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