Python code

Python is a high-level, general-purpose programming language known for its emphasis on code readability and significant indentation. It is widely used for scientific computing, data analysis, machine learning, web development, automation, and scripting.

Basic Syntax and Examples

Python code is executed via an interpreter, allowing for rapid prototyping. The most common entry point is the print() function, and variables are defined without explicit type declarations.

# Variable definition
age = 25
name = "Alice"

# Simple output
print(f"Hello, {name}. You are {age} years old.")

# Lists and loops
fruits = ["Apple", "Banana", "Lime"]
for fruit in fruits:
    print(fruit.upper())

Key Concepts

Variables: Created by assigning a value to a name (e.g., x = 10).
Data Types: Includes Integers, Floats, Strings, Booleans, and Lists.
Control Flow: Uses if, for, and while statements with indentation to define scope.
Functions: Defined using the def keyword, supporting mandatory, optional, and keyword arguments.

Common Applications

Python is frequently used in finance, game scripting, GIS mapping, and education. While it is not typically used for low-level operating system development or high-performance game engines due to execution speed, it often serves as "glue code" to connect faster languages like C.

Python

python.org

Welcome to Python.org

Python source code and installers are available for download for all versions!

Downloads

All Python releases are Open Source. Historically, most, but not all, Python releases have also been GPL-compatible. The Licenses page details GPL-compatibility and Terms and Conditions. ... For most Unix systems, you must download and compile the source code.

Macos

The official home of the Python Programming Language

Windows

The official home of the Python Programming Language

Getting Started

Before getting started, you may want to find out which IDEs and text editors are tailored to make Python editing easy, browse the list of introductory books, or look at code samples that you might find helpful.

Python

general-purpose programming language

python.org

Python is a high-level, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation. Python is dynamically type-checked and garbage-collected. It supports multiple programming paradigms, including structured … Wikipedia

Factsheet

Paradigm Multi-paradigm: object-oriented, procedural (imperative), functional, structured, reflective

Developer Python Software Foundation

Factsheet

Paradigm Multi-paradigm: object-oriented, procedural (imperative), functional, structured, reflective

Developer Python Software Foundation

W3Schools

w3schools.com › python

Python Tutorial

Python Strings Slicing Strings Modify Strings Concatenate Strings Format Strings Escape Characters String Methods String Exercises Code Challenge Python Booleans

Discussions

Python Education

Posts to this subreddit must be requests for help learning python. They do not have to be code-specific, but do have to be about using and learning python. If asking a question about code Format your code for reddit or use a site like github or pastebin. More on reddit.com

r/learnpython

January 23, 2026

What python used for?

Python is a general-purpose language, and thus can be used for pretty much anything you want. This is in contrast to niche languages like bash or matlab, which are typically used primarily for one thing and one thing only. That said, Python is commonly used in the following fields: Scientific and mathematical computing Big data (machine learning, data mining, etc...) Finance (stock markets, etc) Computer graphics System automation and administration Security and penetration testing Web development Scripting (general and application-specific): Python is generally included by default in most Linux installations, and is also embedded into many popular 3rd party programs such as FreeCAD, 3ds Max, Blender, Cinema 4D, Maya, Gimp, Inkscape, etc. Education (Python is the number 1 most commonly taught language in universities ( source )) Mapping and geography: Python is commonly used by many GIS software While Python could in theory be used for the following things, it tends not to be, either due to limitations of the interpreters available today, or due to historical happenstance: Writing operating systems (Python isn't low-level enough) Mobile (The major players in mobile did not adopt Python, though there are people working very hard to bring Python to mobile -- see Kivy) Anything having to do with massive concurrency (current implementations of Python are unfortunately not so fantastic with concurrency, though there are people working to change that) Intensive games or other programs that require speed (Python currently has too much overhead and would be too slow) Anything requiring absolutely safety such as heart monitors and software for spaceships (developers tend to use more strict languages when lives are literally on the line (such as Ada)) Edit: Regarding Python and games -- yes, Python is used in some games (most notably Eve Online), has pretty good support for making 2d via libraries like Pygame, is often a part of games to add a layer of scripting, etc., etc -- my point was that Python will never be used as a part of the core graphics/rendering/physics engine of any games requiring a high degree of computation, such as in modern first person shooters. More on reddit.com

r/learnprogramming

139

320

March 27, 2015

Looking for some examples of "good" Python code to learn from?

I'd suggest the standard library. You'll see both well commented / good code and you'll learn about what's available to you. But where to start? fractions looks moderately easy to understand. logging isn't terribly complex. functools is nice for learning more about decorators. Unfortunately, the standard library uses a lot of single or two letter variable names. Don't do that. If you look in collections, my favoured namedtuple is pretty bad. That aside, the libraries are mostly very good examples of quality code. More on reddit.com

r/learnpython

June 7, 2013

The most WTF Python code I've ever seen

#include #include they knew what they were doing and it is beautiful More on reddit.com

r/Python

138

866

September 18, 2021

Videos

12:00:00

YouTube

Python Full Course for free 🐍 (2024) - YouTube

August 20, 2024

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