how to execute python program

Amer Zain

3 min read

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05-09-2024

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Python is a versatile programming language that allows you to create various applications, from simple scripts to complex web services. But once you have written your code, how do you run it? In this guide, we will explore several methods to execute a Python program, making it easy for beginners to get started.

Table of Contents

1. Prerequisites
2. Method 1: Using the Command Line
3. Method 2: Using an Integrated Development Environment (IDE)
4. Method 3: Running Python Scripts in Jupyter Notebooks
5. Method 4: Online Python Compilers
6. Conclusion

Prerequisites

Before executing a Python program, make sure you have:

• Python Installed: Download and install Python from the official website: python.org.
• Text Editor or IDE: Use a simple text editor like Notepad or a more advanced IDE such as PyCharm or Visual Studio Code.

Method 1: Using the Command Line

The command line is a straightforward way to run Python scripts. Follow these steps:

1. Open Command Prompt (Windows) or Terminal (Mac/Linux).
2. Navigate to the Directory: Use the cd command to change to the directory where your Python script is saved. For example:

   cd path_to_your_script
   

3. Execute the Script: Type the following command:

   python your_script.py
   

   Replace your_script.py with the name of your file. If Python 3 is installed, you may need to use python3 instead of python.

Example:

If your script is named hello.py, you would run:

python hello.py

Method 2: Using an Integrated Development Environment (IDE)

An IDE provides a rich environment for writing and executing code. Here’s how to run your Python program in PyCharm as an example:

1. Open PyCharm.
2. Create a New Project or open an existing one.
3. Create a New Python File: Right-click on the project folder, select New, then Python File.
4. Write Your Code: Type your Python code in the editor.
5. Run the Code: Click the green triangle (Run button) in the upper right corner or right-click on the file and select Run 'your_file_name'.

Note:

Each IDE may have different methods to execute code, but they generally provide a Run button or command.

Method 3: Running Python Scripts in Jupyter Notebooks

Jupyter Notebooks are fantastic for data science and experimentation. Here's how to run code in a Jupyter Notebook:

1. Install Jupyter Notebook if you haven't already:

   pip install notebook
   

2. Launch Jupyter Notebook:

   jupyter notebook
   

3. Create a New Notebook: Click on New and select Python 3.
4. Write Your Code: Type your code into a cell.
5. Execute the Code: Press Shift + Enter to run the cell.

Advantages:

Jupyter Notebooks allow you to see the output immediately and make it easy to document your process.

Method 4: Online Python Compilers

If you don’t want to install anything, you can run Python code online. Here are some popular online compilers:

• Replit
• Programiz
• Google Colab

Steps:

1. Go to one of the online compilers.
2. Write or paste your Python code into the provided editor.
3. Click the Run button to execute your program.

Conclusion

Executing a Python program is a simple process once you know your options. Whether you choose to use the command line, an IDE, Jupyter Notebooks, or an online compiler, each method offers unique advantages. Explore these options to find what works best for you, and soon you'll be running your Python programs like a pro!

For more information on Python programming, check out our articles on Python Basics and Best Practices in Python. Happy coding!