Cheat sheets, downloads & code
Quick references and ready-to-use snippets for Python, Pandas, SQL, Django, Git and more.
Sample Datasets
Fresh practice data in CSV, Excel, JSON or SQL.
Cheat Sheets
One-page references you can bookmark or print.
Downloads
Datasets, notebooks and templates.
Code
Copy-paste snippets for everyday tasks.
Latest cheat sheets
Django Cheat Sheet
Commands, ORM queries and settings.
Git Cheat Sheet
Everyday Git commands.
Pandas Cheat Sheet
Read, select, clean, group and export DataFrames.
Python Cheat Sheet
Syntax, strings, lists, dicts and common built-ins on one page.
SQL Cheat Sheet
Query patterns you'll use every day.
Code snippets
Auto-generate unique slugs in Django
Create unique, URL-friendly slugs on save.
sqlFind duplicate rows in MySQL
List emails that appear more than once.
pythonHTTP requests with retries & timeout
Robust API calls using requests + urllib3 Retry.
pythonMerge many Excel files into one
Combine every .xlsx in a folder into one sheet with a source column.
pythonSend email with attachment (SMTP)
Send an email with a PDF attachment using Gmail/SMTP and an app password.
pythonscikit-learn pipeline template
Preprocessing + model + cross-validation in one pipeline.