Python is an object oriented programming language. Almost everything in Python is an object, with its properties and methods. A Class is like an object constructor, or a “blueprint” for creating objects.
1. CREATE A CLASS IN PYTHON
To create a class, use the keyword class
# Create a class name called “MyClass” class MyClass: x = 5
2. CREATE A OBJECT OF CLASS IN PYTHON
# Create a class name called “MyClass” class MyClass: x = 5 # Now we use class name "myClass" to create object # Create an object named p1 & then print the value of x p1 = MyClass() print(p1.x)
3. THE __INIT__() FUNCTION IN PYTHON
The examples above are classes and objects in their simplest form, and are not really useful in real life applications. To understand the meaning of classes we have to understand the built-in __init__() function. All classes have a function called __init__(), which is always executed when the class is being initiated. Use the __init__() function to assign values to object properties, or other operations that are necessary to do when the object is being created.
# Create a class named "Person" class Person: # use the __init__() function to assign values for name & age def __init__(self, name, age): self.name = name self.age = age p1 = Person("John", 36) print(p1.name) print(p1.age)
4. ACCESS CLASS METHODS IN PYTHON
Objects can also contain methods. Methods in objects are functions that belong to the object.
Let us create a method in the Person class.
class Person: def __init__(self, name, age): self.name = name self.age = age def myfunc(self): print("Hello my name is " + self.name) p1 = Person("John", 36) p1.myfunc()