How to use the classes and objects of python
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Classes-like
Enter:
#! / usr/bin/python
# Filename: simplestclass.py
Class Person:
Pass
# An empty block
P = Person ()
Print (p)
Output:
$python simplestclass.py
Explanation:
Definition declaration of the class
Class class name
The use of the class requires initializing the declaration
P = Person ()
Output as attributes of class p
Method of object
Enter:
#! / usr/bin/python
# Filename: method.py
Class Person:
Def sayHi (self):
Print ('Hello, how are you?')
P = Person ()
P.sayHi ()
# This short example can also be written as Person () .sayHi ()
Output:
$python method.py
Hello, how are you?
Explanation:
The function defined in the parent class can be used after the subclass is initialized.
P = Person ()
P.sayHi ()
_ _ init__ method
Enter:
#! / usr/bin/python
# Filename: class_init.py
Class Person:
Def _ _ init__ (self, name):
Self.name = name
Def sayHi (self):
Print ('Hello, my name is',self.name)
P = Person ('Swaroop')
P.sayHi ()
# This short example can also be written as Person ('Swaroop'). SayHi ()
Output:
$python class_init.py
Hello, my name is Swaroop
Explanation:
The _ _ init__ method is called automatically when all classes are initialized. In this example, the init method is used to get the parameters passed in at initialization.
The self function represents the calling variable itself.
In this example, Swaroop is passed in during initialization, and the assignment of name can be called directly when other functions are called.
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