Python object is created after creating a class. Instant of the object is created using the name same as the class name and it is known as Object Instantiation.
object_name = class_name()
class – A user-defined blueprint for an object that combines a set of attributes that describes the properties of that object.
Data members – It is a class variable or instance variable that holds properties associated with a class and its objects.
self – This is a default parameter in every method in a class, even if we have no arguments to pass.
__init__ – The __init__ represents constructor in python. this is used to initialize the object’s state.
Method – It is a user-defined function that can be defined inside or outside a class definition. It also contains a set of statements to execute
Python creates object example
Simple example code.
# data members of class
color = "black" # attribute 1
name = "Polo" # attribute 2
# class default constructor
def __init__(self, name, color):
self.name = name
self.color = color
# user defined function of class
print("After calling func() method..")
print("My dog's name is", self.name)
print("His color is", self.color)
# object 1 is created and default constructor is called
obj1 = Dog('Robert', 'white')
# user-defined function is called from object 1
# access the attribute
class Student(object): name = "" age = 0 major = "" # The class "constructor" - It's actually an initializer def __init__(self, name, age, major): self.name = name self.age = age self.major = major def make_student(name, age, major): student = Student(name, age, major) return student
How can I create an object and add attributes to it?
Generally, just do this:
class Object(object): pass a = Object() a.somefield = somevalue
Do comment if you have any doubts or suggestions on this Python object topic.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.