Python Constructors – How to Use Them?

AI, web development, game development, data science, software development, and the list is long where Python programming language is used. Constructors in Python play a crucial role, allowing developers to create and initialize objects of a given class. They set up the initial state of an object, ensuring that it’s ready to be used.

Python is a powerful programming language that provides developers with a wide range of tools and techniques to simplify coding. Constructors is one such tool for Python developers. So, understanding Python class Constructors is essential. Every Python development company tailors solutions to meet the unique needs of the client and has to use constructors in many cases during coding.

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What Are Python Constructors?

A Python Constructor is a special method. It gets called when an object is created. It’s like an initial setup for an object, ensuring that it’s ready to roll. Constructors are important in defining the default state of an object.

The primary purpose of a Python class constructor is to initialize the class’s data members when an object is created. In Python, _ _init_ _ method stimulates an object. It returns no values.

  • Syntax Constructors in Python:

Syntax Constructors in Python 1

  • Here is a simple example:

Here is a simple example

In this example, we have a ‘person’ class with a constructor that takes ‘name’ and ‘age’ as parameters. When you instantiate the class, you pass values for these parameters. The Constructor function is responsible for initializing the object’s ‘name’ and ‘age’ attributes. You can explore possibilities with Python and create software as per your needs.

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Types of Constructors in Python Programming Language

Developers widely use three types of constructors in Python. Parameterized Constructors, Non-parameterized Constructors, and Default Constructors. Let’s explore each type.

1) Parameterized Constructors

  • Description: During the creation of an object, these Constructors allow for the inclusion of one or more parameters. These parameters initialize the object’s attributes.
  • Syntax:

Parameterized Constructors 1

  • Example:

Here is a simple example

2) Non-parameterized Constructors

  • Description: They are also known as zero-argument Constructors. They don’t accept any parameter at the time of object creation. They are used to initialize attributes with default values for development Python app development and other software.
  • Syntax:

Non-parameterized Constructors

  • Example:

Non-parameterized Constructors

3) Default Constructors

  • Description: In this type of Constructor, if no constructor is defined in a class, Python provides a default constructor. It initializes objects without specific attributes. It’s the same as a non-parameterized Constructor, although it’s not explicitly defined in the class.
  • Syntax: Python Automatically provides a default constructor if none is defined in the class.
  • Example:

Default Constructors

You can watch the following video to understand

How to Build a Python App?

To build a Python app, you start by planning what your app will do. You can build an app learning programming languages or you can hire Python developers. They use top Python frameworks according to the needs of the project. Python class constructor is a special tool, that helps developers set up your app.

Budget plays a crucial role in deciding the complexity of the app. If you want a customized app then the cost would be higher than the basic app. Python app development costs around $10,000-$30,000. However, many factors affect the cost, so you should consider them.

Developing an app can be a time-consuming and laborious task. If you want to know about it in detail read: How to build an Android app?


In Python, you can choose to use either a parameterized or non-parameterized depending on your object initialization requirements. If no constructor is defined, Python will provide a default Constructor for you. This flexibility allows you to tailor the Constructor to the specific needs of your classes and objects.

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Mr. Sanjay Singh Rajpurohit, An early-aged entrepreneur who always leads his team from the front and achieved success. As the founder & CEO of Technource, a top mobile app & Web development company, he made a global presence in a short time by offering custom software development, premium mobile apps, and website development services to global clients. In his free time, he loves writing. He is featured on Hackernoon, Dzone, Enlear Academy, Articlesfactory, and much more websites.

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