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:
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:
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:
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:
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:
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:
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.