Learn Pandas: Python for Data

Learn Pandas teaches the Python pandas library through short lessons and spaced-repetition practice, so the syntax actually stays in your memory. Stop re-googling groupby. Most people learn pandas by copying snippets and forgetting them a week later. Learn Pandas fixes that: a 60-second lesson to understand the concept, then spaced-repetition drills that bring it back exactly when you are about to forget. Every example is real, runnable pandas code, verified against the actual library. LEARN, THEN REMEMBER • 14 focused micro-lessons, 30 to 90 seconds each, example driven with no walls of text • 200+ practice cards covering DataFrames, Series, reading CSVs, selecting, filtering, sorting, missing values, GroupBy, merging, pivot tables, datetimes, window functions and performance • SM-2 spaced repetition, the algorithm behind Anki, schedules every review for you • Three modes: flashcards, fill in the blank, and multiple choice • Every card explains why the answer works, when to use it, and the mistakes people usually make PRACTICE THE WAY YOU ACTUALLY WORK • Drill any topic on demand • Cram before an interview without disrupting your review schedule • Workflow challenges that mirror real data tasks: read a messy CSV, drop duplicates, parse dates, group and aggregate, sort, export results • Race Mode for quick timed sessions • Star difficult cards and attach your own notes TRACK YOUR PROGRESS • Daily streaks and a review heatmap • Retention tracking over time • Per-topic mastery bars, with automatic detection of your weakest areas • Achievement badges • Optional XP leaderboard, off by default A REFERENCE YOU WILL ACTUALLY OPEN Searchable documentation for every method: purpose, syntax, parameters, return values, examples, common mistakes and related methods. Global search finds any method, topic or tag instantly. BUILT FOR REAL LIFE • Works completely offline, no internet required, good for flights and commutes • No ads, no in-app purchases, no tracking • Accounts are optional and used only for backup and sync. Your progress is never locked behind a login • Dark and light themes • Monospace, syntax-highlighted code • One decision per screen, so a spare minute is enough WHO IT IS FOR Data analysts, data scientists, Python developers, students, and anyone preparing for a data science or analytics interview. If you know what you want to do but can never remember the exact pandas syntax, this is built for you. Ten minutes a day is enough. Open the app, clear your scheduled reviews, and get to the point where pandas syntax is something you remember rather than something you search for.

• Workflow challenges: multi-step pandas pipelines that test whole workflows, not single methods • New seaborn and matplotlib courses, plus a pandas Plotting topic — charts are drawn right in the app • Sync your progress across devices with an optional free account • Forgot your password? You can now reset it from the sign-in screen • Daily reminders so you don't break your streak • Get in touch from Settings with the new contact form