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What is PyDev?

PyDev is an open-source integrated development environment (IDE) for Python. It is designed to provide a complete development environment for Python programmers. Also, it is built on top of the Eclipse platform and supports various features like debugging, code analysis, code completion, and much more. PyDev is compatible with all the major operating systems like Windows, Linux, and Mac OS X, making it a popular choice among developers.

In this article, we are going to explore the PyDev IDE, its features, and how to use it to develop Python applications.

Steps to Install PyDev

Before we use PyDev, we need to install it in our system. Anyone can install the PyDev by following the below steps.

Step 1: Install Eclipse IDE

We need to first install Eclipse IDE before installing PyDev. Eclipse is a widely used open-source IDE that supports various programming languages like Java, C++, and Python. To install Eclipse, we can go to the official website and download the installer for our respective operating system.

Step 2: Install PyDev Plugin

Once we have successfully installed Eclipse, we can install the PyDev plugin by following below steps:

  1. Open Eclipse IDE
  2. Go to Help → Eclipse Marketplace
  3. Search for PyDev and click on Install
  4. Follow the on-screen instructions to install the plugin

After completing the above steps, PyDev should be installed and ready to use.

How to Use PyDev

Once we have successfully installed PyDev, we can start using it to develop Python applications. Here's a step-by-step process on how to use PyDev:

Step 1: Create a new PyDev project

When we want to create a new PyDev project, we need to follow these steps:

  • Open Eclipse IDE
  • Click on File → New → PyDev Project
  • Enter the project name and location
  • Click on Finish

Step 2: Create a new Python module

Once we have created a new PyDev project, we can create a new Python module by following these steps:

  • Right-click on the project name
  • Click on New → PyDev Module
  • Enter the module name and click on Finish

Step 3: Write Python code

Now we have created a new Python module; we can start writing Python code. PyDev provides various features like code completion, syntax highlighting, and code analysis, which can help us write code faster and with fewer errors.

Here's an example of Python code that we can write using PyDev:

Program 1:

The above example shows a function used to calculate the factorial of a number and then print the factorial of 5.

Step 4: Run the Python code

Once we have successfully written our Python code, we can run it using PyDev by following these steps:

  • Right-click on the Python module name
  • Click on Run As → Python Run

After running the code, we should see the output in the console.




In the above program, the factorial() function calculates the factorial of a given number n recursively. The base case is when n equals 0, and the factorial is 1-otherwise, the function multiplies n by the factorial of n-1.

When factorial(5) is called, the function first checks if n equals 0, which is not the case. It then returns 5 * factorial(4). The function calls itself again with n-1, which is 4. The process repeats until the base case is reached, and factorial(0) is called, which returns 1.

Then, the function returns 5 * 4 * 3 * 2 * 1 * 1 = 120, which is printed out by the print() function.

Example 2:


What is PyDev


The above program calculates the length of the hypotenuse of a right triangle using the Pythagorean theorem. It prompts the user to enter the lengths of the legs of the right triangle, calculates the length of the hypotenuse, and then prints the result to the console. It uses the math module to access the square root function and f-string formatting to print the result with two decimal places.

Benefits of using PyDev IDE

There are so many benefits to using PyDev for Python development. These are as below.

  1. Code completion: PyDev provides intelligent code completion. With the help of this, we can write code faster and with fewer errors. It suggests the available methods and variables for a particular object or module.
  2. Debugging: PyDev has a built-in debugger. It allows us to step through our code and identify and fix errors quickly.
  3. Code analysis: PyDev performs static code analysis. It is used to identify potential errors and provide suggestions for improvement, which can help us write better code.
  4. Multi-platform support: PyDev is compatible with all major operating systems, including Windows, Linux, and Mac OS X, making it a popular choice among developers.
  5. Integration with Eclipse: PyDev is built on top of the Eclipse platform, which provides a rich set of features for development, including support for other programming languages and version control systems.
  6. Plugins: PyDev supports plugins, which can extend its functionality to support additional features, such as Django and Flask web frameworks.

Disadvantages of using PyDev

PyDev is a very popular IDE for Python development. But it has some disadvantages. These are as follows.

  1. Steep learning curve: PyDev can be complex and intimidating for beginners, especially those who are not familiar with the Eclipse IDE. It can take some time to learn how to use PyDev effectively.
  2. Resource-intensive: PyDev can be resource-intensive, especially when working with large codebases or running multiple instances of the IDE at the same time. This can lead to slow performance on older or less powerful computers.
  3. Limited documentation: While PyDev has some documentation available, it can be limited and difficult to navigate. This can make finding solutions to specific problems or learning how to use certain features challenging.
  4. Requires Eclipse: PyDev is built on top of the Eclipse IDE, which means that users must first install Eclipse before installing PyDev. This can add an extra step to the installation process and take up additional disk space.
  5. Limited community support: While PyDev has an active community, it may not be as large or active as other Python development communities. This can make it more difficult to find answers to questions or receive support from other users.


In conclusion, PyDev is a powerful IDE for Python development that provides various features to make the development process easier and faster. This article shows how to install PyDev and use it to develop Python applications. With PyDev, we can write Python code faster, with fewer errors, and with more confidence.

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