Python
How to Print a Python List (Every Useful Way)
Printing a list plainly, one item per line, numbered, joined into a sentence, or as a formatted table — with the join()…
Python
Plain-English Python guides, from installing it to writing small programs that do real work. Short examples you can copy, run and change.
30 guides
Python
Handling Warnings in Python
What Python warnings mean, how to see them all, silence the ones you have decided about, and turn the dangerous ones into…
Python
Python Array Manipulation: Fixing Errors and Improving Efficiency
The array errors beginners hit most — IndexError, modifying while looping, the copy trap — plus the changes that actually make list…
Python
Working with Files and I/O in Python
Reading and writing files, handling paths that work on every machine, and the encoding trap that only appears on someone else’s computer.
Python
Python Virtual Environments Explained
A virtual environment is a private folder of packages for one project. Why you need one, how to create and activate it…
Python
Reading and Writing Files in Python
How to open, read, write and append files in Python using with, plus the path and encoding traps that make files behave…
Python
Python try / except Explained
How to handle errors instead of crashing: catching specific exceptions, else and finally, raising your own, and why a bare except will…
Python
Python While Loops Explained
A while loop repeats for as long as a condition stays true. How to write one, when to use it instead of…
Python
Python Functions Explained
Defining functions, parameters and defaults, keyword arguments, return values, scope, docstrings and when to split code into functions.
Python
Python Dictionaries Explained
Dictionaries store labelled values. Here is how to create, read, update and loop over them, plus how to avoid the KeyError that…
Python
Python Lists Explained
Creating lists, indexing, slicing, adding and removing items, sorting, and the copy trap that catches every Python beginner at least once.
Python
Python For Loops Explained
How for loops work in Python: looping over lists, using range, enumerate and zip, break and continue, and building a list from…
Related topics
Where to go next
Programming Basics
The ideas every language shares — variables, loops, functions and how a program actually runs.
12 guides
JavaScript
How JavaScript works in the browser, explained with short examples you can paste and run.
16 guides
Web Development
HTML, CSS and the pieces that turn code into a page people can visit.
9 guides
Keep going — pick your next guide
The fastest way to improve is to read one guide, then build the thing it describes. Start with the basics, or jump straight to a project.