Python
Understanding Python If Else Statements
How if, elif and else work in Python, what counts as true, and the six mistakes that trip beginners up — colons,…
Python
Plain-English Python guides, from installing it to writing small programs that do real work. Short examples you can copy, run and change.
56 guides
Python
Web Scraping and Automation
How to scrape a web page with Python responsibly: requests and BeautifulSoup, reading robots.txt, rate limiting, and when to use an API…
Python
Python Recursion Error: Fixing Maximum Depth Exceeded
RecursionError means your function called itself too many times. Here is how to find the missing base case, when to raise the…
Python
Python Dictionary Key Checking with in
How to check whether a key exists in a Python dictionary, why the in operator beats has_key and try/except, and when .get()…
Python
Conductance: Graph Community Detection in Python
What graph conductance measures, why a low score means you have found a real community, and how to compute it in Python…
Python
Python Tuple Comprehension: A Beginner’s Guide
Python has no tuple comprehension. Here is what the parentheses actually create, how to build a tuple from a comprehension, and when…
Python
Python Basics
The core of Python in one page: variables, types, conditions, loops, functions and lists, each with a runnable example and the mistake…
Python
Python Not Working on a Mac After Installation
Installed Python on macOS and the terminal still says command not found, or runs the wrong version? python vs python3, Homebrew vs…
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
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,…
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