Rajesh Kumar

III. Python: Installation

by Rajesh Kumar 1 min read

Python is a high-level, interpreted programming language known for its simplicity and readability. It is widely used in various domains such as web development, data science, artificial intelligence, automation, and more. Python’s syntax is designed to be easy to learn, making it an excellent choice for beginners.

Features of Python

  • Easy to Learn: Simple and readable syntax.
  • Interpreted: No need for compilation; executed line by line.
  • Dynamic Typing: No need to specify variable types.
  • Extensive Libraries: SciPy, NumPy, Matplotlib, SymPy for scientific computing.
  • Cross-Platform: Runs on Windows, Linux, and macOS.

Table of Contents

  1. Installing Python
  2. Running Python Code

Writing and Running Python Code

Python code can be written in:

  • Interactive Python Shell (REPL)
  • Jupyter Notebooks
  • Python Scripts (.py files)
  • Integrated Development Environments (IDEs) like PyCharm, VS Code

Installing Python

Step 1: Download Python

  1. Visit the official Python website: https://www.python.org/.
  2. Go to the Downloads section and download the latest version of Python for your operating system (Windows, macOS, or Linux).

Step 2: Install Python

  1. Run the downloaded installer.
  2. Check the box that says “Add Python to PATH” during installation.
  3. Click Install Now and follow the instructions.

Step 3: Verify Installation

  1. Open a terminal (Command Prompt on Windows, Terminal on macOS/Linux).
  2. Type the following command and press Enter: 
    python --version
  3. If Python is installed correctly, you will see the version number (e.g., Python 3.11.2).

Running Python Code

Option 1: Using the Python Interpreter

  1. Open a terminal or command prompt.
  2. Type python and press Enter.

  3. You will enter the Python interactive shell, where you can type and execute Python code line by line.

    Example:

    >>> print("Hello, World!")
Hello, World!

Option 2: Using a Text Editor or IDE

  1. Open a text editor (e.g., Notepad, VS Code, PyCharm).
  2. Write your Python code in a file with a .py extension (e.g., hello.py).
  3. Save the file and run it using the terminal: 
    python hello.py