Code. Simply. Clearly. Calmly.

Video tutorials for modern ideas and open source tools.

We currently host 652 short videos in 87 courses.

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Made by people who want to remedy the skill anxiety.

Short and simple video lessons that start from scratch.

Tools and thoughts that might make your professional life more enjoyable.

NEW CONTENT ANNOUNCEMENT The Calmcode Challenge!

A sequence of increasingly difficult programming puzzles
where you need to keep finding the hidden message!

Tools for Python People

args kwargs
Function Arguments
bandit
Checks for Security
black
Format Your Code
chime
Sound Cues
comprehensions
Awesome One-Liners
context managers
Automatically Cleaned Python
cookiecutter
Automate Boilerplate
cool cli
Joy in the Terminal
datasette
Explore and Publish
decorators
Expressive Functions
entr
Repeat on Change
fastapi
Fast WebStuff
flake8
Check Your Style
gazpacho
Simple Scraping
gin
Configure Python
github actions
Running Tasks on GitHub
lambda
Expressive Functions
locust
Web Stress Tests
logging
Better Hindsight
makefiles
Not War
method chains
Functional Objects
mkdocs
Documentation Tool
ngrok
Quick Demo Tunnels
parse
Inverse of Format
pathlib
For Files And Folders
playwright
Web tests. End to end.
pre-commit
Prevent Bad Commits
pyinstrument
Measure Slow Code
pytest
Intro to Testing
pytest tricks
Utilities for Pytest
qr code
Image Links
readme files
Dearme, Readme
recursion
Rephrasing Complexity
rich
Great Terminal Output
ssh
Connect to Servers
streamlit
Interactive Demos
tqdm
Progress Bars
typer
Make Grand Cli's
virtualenv
Environments Matter
zsh
Oh my! Nice Shell!

Python Data Tools

altair
Interactive Plots
annoy
Fast Array Retrieval
bad labels
And how to find them.
cvxpy one
Linear Programming
cvxpy two
Quadratic Portfolio
datasette
Explore and Publish
deon
Sensible Checklists
dirty cat
Categorical Data
embeddings
The intuition behind them
hiplot
Parallel Coordinates
human learn
Rule Based Systems
ipywidgets
UI on Jupyter
jax
Autodiff
jupyter lab
Happy Notebooks
matplot gif
Quick Gifs
matplotlib
Quick Plots
memo
Collect Stats
model-mining
From Data to Model
neo4j
Great Graph Database
numba
Fast Numeric Code
pandas pipe
Clean Pandas Code
pandas datetime
Datetimes in Pandas
partial_fit
Batches of ML
patsy
Feature Selection
pigeon
Simple Labelling
polars
Faster DataFrames
ray
Parallel Execution
scikit dummy
Smart Benchmark
scikit learn
Overview Starts Here
scikit meta
Extra Model Behavior
scikit metrics
Measurement Matters
scikit prep
Preprocess Data
scikit save
Re-Use Models Safely
sympy
Math with Python

Shorts

safety.py
Check Vulnerable Packages
grep
Terminal Regex
pytesseract.py
Find Text in Images
jq
Json from the Terminal
yarl.py
Dealing with URLs
mvp.css
Start with Simple Style
parallel
Many Processes
watermark.py
Explain your Machine
interrogate.py
Check for Docstrings
webbrowser.py
Open with Python
perfplot
Performance Plots
htop
Compute Dashboard
ncdu
Explore Diskspace
workalendar.py
So many holidates.
tldraw.com
Draw Quick SVGs
pur.py
Update your package versions
webp
Lighter Images
sh.py
Shell from Python
questionary
Terminal Prompts
watch
Watch and Repeat
orjson.py
Serialize Dictionaries
lunr.py
Python Mini Search Engine
nbqa
Code Quality in Notebooks
toposort.py
Sorting a Process
datefinder.py
So many date formats.
typeguard.py
Check Types Early
retry.py
Run functions again.
pint.py
Converting Units

Elements of Production

vector
Routing Log Events

Lessons from Datasets

birthday problem
The *Real* One
diseases
Optimal Testing Strategy
sleep
Programmers Need It
smoking
Lie With Statistics
statistical disservice
Numbers that Worsen

Software Worth Paying For

better uptime
Neat Uptime Service
nounproject
Amazing Icons for All

Tools for the R Crowd

dplyr verbs
Simple Data Plier
ggplot
Awesome Plotting

Meta

content
Our Creation Process
mac apps
Small but Helpful
pomodoro
Time Management
remote
With No Office