Starting a Python Script: A Step-by-Step Guide

[

How to Start a Python Script

What Scripts and Modules Are

In computing, a script is a text file that contains a logical sequence of commands that can be executed to perform a specific task. These commands are written in a scripting language, which is a programming language that allows you to manipulate, automate, and customize tasks.

How to Run Python Scripts From the Command Line

Using the python Command

The most common way to run a Python script from the command line is by using the python command followed by the name of the script file. For example:

python my_script.py

Using the Script’s Filename Directly

In some cases, you can run a Python script by simply typing the script’s filename directly into the command prompt. This works if the script file has the executable permission. For example:

my_script.py

Running Modules With the -m Option

Python modules can also be executed from the command line using the -m option. This allows you to run a specific module as the main entry point of your script. For example:

python -m my_module

How to Run Python Code Interactively

Getting to Know the Python Interpreter

The Python interpreter is a command-line program that allows you to execute Python code interactively. You can access the interpreter by typing python or python3 in the command line.

Running Python Code Interactively

To run Python code interactively, you can simply type or paste the code directly into the Python interpreter prompt. The code will be executed immediately, and you will see the output directly on the command line.

How to Run Scripts From Python Code

Taking Advantage of import Statements

Using the import statement, you can run a Python script from another script. This allows you to reuse code and execute specific functions or classes from the imported script. For example:

import my_script

my_script.main()

Using the importlib Standard-Library Module

The importlib module provides additional functionality for running scripts and modules dynamically at runtime. You can use importlib to import and execute scripts programmatically. For example:

import importlib

my_script = importlib.import_module("my_script")
my_script.main()

Leveraging the Power of the Built-in exec() Function

The exec() function in Python can be used to execute a string of Python code dynamically. You can pass the script’s content as a string to exec(), and it will be executed on the fly. For example:

script = """
print("Hello, World!")
"""

exec(script)

How to Run Python Scripts on IDEs and Code Editors

Most integrated development environments (IDEs) and code editors provide a built-in feature to run Python scripts directly from the interface. The exact method may vary depending on the IDE or editor you are using. Look for options like “Run” or “Execute” to run your script with a single click.

How to Run Python Scripts From a File Manager

Another way to run Python scripts is by executing them directly from a file manager or file explorer. You can right-click on the script file and select options like “Run,” “Open with Python,” or “Execute” to run the script.

Conclusion

Running Python scripts is a fundamental skill for every Python developer. In this tutorial, we have explored various methods to start a Python script, including running it from the command line, running it interactively, executing scripts from Python code, using IDEs and code editors, and running scripts from a file manager. By mastering these techniques, you will be able to execute your Python code efficiently and accomplish your tasks effectively.