Python
How to Get File Name from a Path in Python
Four ways to pull the file name out of a path in Python, when to use pathlib instead of os.path, and how…
Python
Plain-English Python guides, from installing it to writing small programs that do real work. Short examples you can copy, run and change.
72 guides
Python
Exploring np.stack() in NumPy and Python
np.stack() joins arrays along a brand-new axis. Here is what that means, how it differs from concatenate, vstack and hstack, and when…
Python
Building a Complete Python Project
Take a Python script from a single messy file to a real project: folders, a virtual environment, a requirements file, tests and…
Python
Fixing “‘python’ is not recognized” in cmd and PowerShell
Python is installed but Windows cannot find it. The cause is a missing PATH entry or the Microsoft Store alias. Three fixes,…
Python
Setting a Sequence of List Elements in Python
Assigning to a slice, filling a range of positions, replacing a section with a different number of items, and the shape errors…
Python
uv vs pip, venv and Poetry: Should You Switch?
uv replaces pip, venv, pyenv and Poetry with one fast tool. What it does differently, a side-by-side of everyday commands, and who…
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
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…
Related topics
Where to go next
Programming Basics
The ideas every language shares — variables, loops, functions and how a program actually runs.
17 guides
JavaScript
How JavaScript works in the browser, explained with short examples you can paste and run.
32 guides
Web Development
HTML, CSS and the pieces that turn code into a page people can visit.
13 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.