python run file from command line

January 22, 2024

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Title: Running Python Files from the Command Line: A Step-by-Step Tutorial
Introduction:
Running Python files from the command line is a fundamental skill for any Python developer. This tutorial will guide you through the process, explaining the necessary commands and providing code examples along the way.
Prerequisites:
Before you begin, ensure that you have Python installed on your system. You can download the latest version of Python from the official website: https://www.python.org/downloads/
Step 1: Create a Python File
Open your preferred text editor and create a new Python file. For this tutorial, let’s create a simple Python script named “hello.py” that prints a greeting message.
Save the file in a location of your choice.
Step 2: Open the Command Line Interface (CLI)
Open your system’s command line interface. The process may vary depending on your operating system. On Windows, you can use the Command Prompt or PowerShell. On macOS and Linux, use the Terminal.
Step 3: Navigate to the File’s Directory
Use the cd command to navigate to the directory where your Python file is located. For example:
Replace “path/to/your/file” with the actual path to your “hello.py” file.
Step 4: Run the Python File
Once you are in the correct directory, use the python command followed by the name of your Python file to execute it. For example:
On Windows:
On macOS/Linux:
Note: On some systems, you may use python instead of python3. Check your Python version by running python –version or python3 –version to determine the appropriate command.
Step 5: Verify the Output
After running the command, you should see the output of your Python script on the command line:
Congratulations! You have successfully run a Python file from the command line.
Additional Tips:
If your Python script requires command-line arguments, you can pass them after the script name. For example:
To run a Python script without explicitly specifying the Python version, consider adding a shebang line at the beginning of your script. For example:
Make the script executable (e.g., chmod +x hello.py on Linux/macOS) and run it directly:
This tutorial covers the basics of running Python files from the command line. As you delve deeper into Python development, you’ll encounter more advanced techniques and tools, but this knowledge serves as a solid foundation for your journey.
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