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🐍 100 Python Challenge Projects

Welcome to the 100 Python Challenge Projects! These exercises are designed to test and improve your Python skills across a wide range of topics — from beginner to advanced. Each challenge includes a brief description, suggested libraries, and hints to help you get started.

🔰 Beginner (1–20)

1. Hello World Web App

  • Description: A simple Flask web server that displays "Hello, World!" in the browser.
  • Libraries: flask
  • Hint: Use Flask's route decorators and app.run().

2. Basic Calculator

  • Description: Perform basic arithmetic operations from user input.
  • Libraries: None
  • Hint: Use input(), eval() or define functions for each operation.

3. To-Do List (CLI)

  • Description: Command-line to-do manager with add/remove/show options.
  • Libraries: argparse, os
  • Hint: Store tasks in a list or text file.

4. Simple Guessing Game

  • Description: User guesses a number between 1–100.
  • Libraries: random
  • Hint: Use a loop until guess is correct.

5. Fibonacci Generator

  • Description: Generate a list of Fibonacci numbers.
  • Libraries: None
  • Hint: Use recursion or iteration.

6. Palindrome Checker

  • Description: Check if a string is a palindrome.
  • Libraries: None
  • Hint: Compare string to its reverse.

7. BMI Calculator

  • Description: Calculate BMI from weight and height.
  • Libraries: None
  • Hint: BMI = weight / (height^2)

8. Multiplication Table Generator

  • Description: Generate a table for any number.
  • Libraries: None
  • Hint: Use a for loop.

9. Password Generator

  • Description: Generate strong random passwords.
  • Libraries: random, string
  • Hint: Combine uppercase, lowercase, digits, and symbols.

10. Countdown Timer

  • Description: Countdown from a set time in seconds.
  • Libraries: time
  • Hint: Use time.sleep() in a loop.

11. Unit Converter

  • Description: Convert distances, weights, etc.
  • Libraries: None
  • Hint: Use fixed conversion rates.

12. Mad Libs Generator

  • Description: Fill in blanks in a story with user input.
  • Libraries: None
  • Hint: Use string templates.

13. Rock, Paper, Scissors

  • Description: CLI game against the computer.
  • Libraries: random
  • Hint: Use conditionals to compare choices.

14. Currency Converter (Static)

  • Description: Convert currency using static rates.
  • Libraries: None
  • Hint: Hardcode some exchange rates.

15. Dice Roller Simulator

  • Description: Simulate a dice roll.
  • Libraries: random
  • Hint: Use randint(1, 6).

16. Email Slicer

  • Description: Extract username and domain from email.
  • Libraries: None
  • Hint: Use string split() method.

17. Alarm Clock

  • Description: Set an alarm at a specific time.
  • Libraries: datetime, time
  • Hint: Compare current time to alarm time.

18. Number to Words

  • Description: Convert digits into English words.
  • Libraries: inflect
  • Hint: Use engine.number_to_words().

19. Login System

  • Description: Simple CLI login and password system.
  • Libraries: getpass
  • Hint: Use a dictionary for storing credentials.

20. QR Code Generator

  • Description: Generate QR code from user input.
  • Libraries: qrcode
  • Hint: Save as image with .make() and .save().

🧪 Intermediate (21–60)

21. Weather App (CLI)

  • Description: Get live weather using an API.
  • Libraries: requests
  • Hint: Use OpenWeatherMap API.

22. To-Do List (GUI)

  • Description: Add/remove/display tasks with a GUI.
  • Libraries: tkinter
  • Hint: Use Listbox and Button.

23. Markdown to HTML Converter

  • Description: Convert .md files to .html.
  • Libraries: markdown
  • Hint: Read file and use markdown.markdown().

24. Web Scraper

  • Description: Scrape titles from a website.
  • Libraries: requests, BeautifulSoup
  • Hint: Parse HTML with soup.find_all().

25. Pomodoro Timer

  • Description: Time your focus and break sessions.
  • Libraries: tkinter, time
  • Hint: 25 min focus, 5 min break cycle.

26. YouTube Video Downloader

  • Description: Download video from a URL.
  • Libraries: pytube
  • Hint: Use YouTube.streams.first().download().

27. File Organizer

  • Description: Sort files by extension into folders.
  • Libraries: os, shutil
  • Hint: Loop through files and move them.

28. Expense Tracker

  • Description: Track and total daily expenses.
  • Libraries: csv, datetime
  • Hint: Store and read entries in CSV.

29. Chatbot (Rule-Based)

  • Description: Respond to simple user inputs.
  • Libraries: None
  • Hint: Use if-elif conditions.

30. PDF Merger

  • Description: Merge multiple PDFs into one.
  • Libraries: PyPDF2
  • Hint: Use PdfMerger.append().

31. Typing Speed Test

  • Description: Measure user typing speed.
  • Libraries: time
  • Hint: Compare time before and after typing.

32. Image Resizer

  • Description: Resize images to new dimensions.
  • Libraries: Pillow
  • Hint: Use .resize() and .save().

33. Tic Tac Toe (CLI)

  • Description: Two-player game on the terminal.
  • Libraries: None
  • Hint: Use a 2D list or flat list for board.

34. Random Quote Generator

  • Description: Fetch a random quote from an API.
  • Libraries: requests
  • Hint: Use quotable.io or similar API.

35. Digital Clock

  • Description: Live digital clock with GUI.
  • Libraries: tkinter, time
  • Hint: Update time every second.

36. Barcode Generator

  • Description: Create a barcode image.
  • Libraries: python-barcode
  • Hint: Use EAN13 or similar class.

37. Face Detector

  • Description: Detect faces in images.
  • Libraries: opencv-python
  • Hint: Use Haar Cascades.

38. MP3 to WAV Converter

  • Description: Convert audio files from MP3 to WAV.
  • Libraries: pydub
  • Hint: Use AudioSegment.from_mp3().

39. GIF Creator

  • Description: Create GIF from images.
  • Libraries: Pillow
  • Hint: Use .save(..., save_all=True).

40. Flashcard CLI App

  • Description: Display flashcards to learn new terms.
  • Libraries: json
  • Hint: Load terms from a JSON file.

41. Markdown Blog Generator

  • Description: Generate static blog HTML pages from markdown.
  • Libraries: markdown, jinja2
  • Hint: Use HTML template rendering.

42. Stopwatch App

  • Description: A stopwatch with start/stop/reset.
  • Libraries: time
  • Hint: Track elapsed time.

43. Quiz Game

  • Description: Load and display MCQs from file.
  • Libraries: json
  • Hint: Include score tracking.

44. Desktop Notifier

  • Description: Show desktop popup notifications.
  • Libraries: plyer
  • Hint: Use notification.notify().

45. Reddit Scraper

  • Description: Scrape top posts from subreddit.
  • Libraries: praw
  • Hint: Authenticate with Reddit API.

46. CSV to JSON Converter

  • Description: Convert CSV data to JSON.
  • Libraries: csv, json
  • Hint: Use csv.DictReader.

47. Markdown Table Formatter

  • Description: Convert CSV rows to Markdown table format.
  • Libraries: None
  • Hint: Format strings with |.

48. Screenshot Taker

  • Description: Take a full-screen capture.
  • Libraries: pyautogui
  • Hint: Use pyautogui.screenshot().

49. Audio Recorder

  • Description: Record audio from mic.
  • Libraries: pyaudio
  • Hint: Stream to WAV.

50. Currency Converter (Live)

  • Description: Convert currency using API data.
  • Libraries: requests
  • Hint: Use exchangerate.host or similar.

51. Chat Logger

  • Description: Save all user input into a log file.
  • Libraries: datetime
  • Hint: Append each message with timestamp to a .txt file.

52. Instagram Hashtag Generator

  • Description: Generate hashtags for a given topic or keyword.
  • Libraries: random, json
  • Hint: Use a local file of hashtags and random sampling.

53. Memory Puzzle Game

  • Description: Match pairs of cards by memory.
  • Libraries: pygame
  • Hint: Flip two cards, then hide if no match.

54. Command Line Dictionary

  • Description: Define words via dictionary API.
  • Libraries: requests
  • Hint: Use api.dictionaryapi.dev.

55. Invoice Generator

  • Description: Generate printable PDF invoices.
  • Libraries: reportlab, datetime
  • Hint: Generate PDF with tables, totals, and date.

56. Calendar App

  • Description: Create and view calendar events.
  • Libraries: tkinter, calendar, datetime
  • Hint: Let users click dates and add tasks.

57. Site Availability Checker

  • Description: Check if a list of websites is online.
  • Libraries: requests
  • Hint: Use requests.get() and check status_code.

58. Chat Interface (GUI)

  • Description: Simulate chat between two users.
  • Libraries: tkinter
  • Hint: Use input boxes and chat window for display.

59. Directory Tree Generator

  • Description: Display a folder structure like tree command.
  • Libraries: os
  • Hint: Use recursion with indentation.

60. System Monitor

  • Description: Monitor CPU, RAM, and disk usage live.
  • Libraries: psutil
  • Hint: Display usage as percentages in terminal.

🧠 Advanced (61–100)

61. Chatbot with NLP

  • Description: Build a smart chatbot using natural language processing.
  • Libraries: nltk, re
  • Hint: Tokenize and match user intents.

62. Stock Market Dashboard

  • Description: Show live stock prices and charts.
  • Libraries: yfinance, plotly, dash
  • Hint: Use Dash callbacks for dynamic updates.

63. Twitter Bot

  • Description: Automatically tweet from your account.
  • Libraries: tweepy
  • Hint: Authenticate via Twitter API.

64. Portfolio Website (Flask)

  • Description: Create a personal portfolio to showcase your projects.
  • Libraries: flask, jinja2
  • Hint: Use templates and routes for dynamic pages.

65. Face Recognition App

  • Description: Identify people in images using face encoding.
  • Libraries: face_recognition, opencv-python
  • Hint: Load known faces and compare encodings.

66. Instagram Image Downloader

  • Description: Download photos from Instagram.
  • Libraries: instaloader
  • Hint: Login with credentials to access private posts.

67. Crypto Tracker App

  • Description: Track live prices of cryptocurrencies.
  • Libraries: requests, matplotlib, tkinter
  • Hint: Use CoinGecko or similar API.

68. FastAPI REST API

  • Description: Build an async REST API for a microservice.
  • Libraries: fastapi, uvicorn, pydantic
  • Hint: Use data models and decorators.

69. Movie Recommendation System

  • Description: Suggest similar movies based on user input.
  • Libraries: pandas, scikit-learn
  • Hint: Use cosine similarity on TF-IDF matrix.

70. Language Translator

  • Description: Translate text between languages.
  • Libraries: googletrans, deep_translator
  • Hint: Detect language and translate using API.

71. News Aggregator

  • Description: Display latest headlines from multiple sources.
  • Libraries: newsapi-python
  • Hint: Loop through top headlines by category.

72. Voice Assistant

  • Description: Respond to voice commands like “what’s the time?”
  • Libraries: speechrecognition, pyttsx3
  • Hint: Use speech-to-text and conditionals.

73. Virtual Whiteboard

  • Description: Draw using webcam and color tracking.
  • Libraries: opencv-python, numpy
  • Hint: Use color masking and contour tracking.

74. AI Sudoku Solver

  • Description: Solve any Sudoku puzzle using backtracking.
  • Libraries: numpy
  • Hint: Use recursion to fill empty cells.

75. Chat Application (Socket)

  • Description: Build a basic LAN chat server and client.
  • Libraries: socket, threading
  • Hint: Use separate threads for sending/receiving.

76. Resume Parser

  • Description: Extract info from PDF resumes.
  • Libraries: pdfminer.six, re
  • Hint: Parse name, email, and skills.

77. AI Snake Game

  • Description: Snake game controlled by AI.
  • Libraries: pygame, numpy
  • Hint: Use a neural network or rule-based AI.

78. Email Automation

  • Description: Automatically send bulk emails to a contact list.
  • Libraries: smtplib, email, csv
  • Hint: Use CSV for contact list and MIMEText for email body.

79. AI Flappy Bird

  • Description: Create Flappy Bird and train an AI to play it.
  • Libraries: pygame, neat-python
  • Hint: Use NEAT algorithm to evolve the agent.

80. Image Caption Generator

  • Description: Generate text captions for images.
  • Libraries: tensorflow, keras, PIL
  • Hint: Use CNN + LSTM-based architecture.

81. Object Detection App

  • Description: Detect multiple objects in real-time using webcam.
  • Libraries: opencv-python, YOLO, cvlib
  • Hint: Load pre-trained object detection model.

82. Handwritten Digit Recognizer

  • Description: Classify digits from images using a trained model.
  • Libraries: tensorflow, keras, sklearn
  • Hint: Use the MNIST dataset.

83. PDF Text Extractor

  • Description: Extract text content from PDF documents.
  • Libraries: PyPDF2, pdfplumber
  • Hint: Loop through all pages and extract text.

84. AI ChatGPT Clone (Local)

  • Description: Build a mini conversational model using transformers.
  • Libraries: transformers, torch
  • Hint: Use pre-trained models like DialoGPT.

85. Blog CMS (with Flask or Django)

  • Description: Web-based blog manager with posts and admin panel.
  • Libraries: flask or django, sqlite3
  • Hint: Use a relational DB and login system.

86. Video to GIF Converter

  • Description: Convert short videos into animated GIFs.
  • Libraries: moviepy
  • Hint: Use .subclip() and .write_gif().

87. Keylogger

  • Description: Record every keystroke typed on the keyboard.
  • Libraries: pynput
  • Hint: Log output to a file — for educational purposes only.

88. OCR App

  • Description: Extract text from images using OCR.
  • Libraries: pytesseract, Pillow
  • Hint: Preprocess image before feeding to OCR engine.

89. Traffic Sign Classifier

  • Description: Identify traffic signs from images.
  • Libraries: tensorflow, opencv, sklearn
  • Hint: Use GTSRB dataset.

90. Virtual Mouse (with Hand Gestures)

  • Description: Control your mouse using webcam and hand gestures.
  • Libraries: opencv, mediapipe, pyautogui
  • Hint: Track hand landmarks with Mediapipe.

91. AI Voice Cloning

  • Description: Clone a voice from a sample and synthesize speech.
  • Libraries: coqui-ai, torchaudio, resemblyzer
  • Hint: Use pretrained TTS + speaker encoder.

92. Excel Report Generator

  • Description: Generate styled Excel reports.
  • Libraries: openpyxl, xlsxwriter
  • Hint: Format tables, fonts, and charts.

93. Realtime Chat (WebSockets)

  • Description: Live browser-to-browser chat app.
  • Libraries: Flask-SocketIO, eventlet
  • Hint: Use rooms and emit messages in real time.

94. Fitness Tracker App

  • Description: Track workout logs and progress.
  • Libraries: tkinter, sqlite3, matplotlib
  • Hint: Store exercises with timestamps.

95. AI Text Summarizer

  • Description: Summarize long articles into short bullet points.
  • Libraries: transformers, sumy, nltk
  • Hint: Use pretrained BART or T5 model.

96. E-commerce Backend API

  • Description: Backend for a shopping app with products, users, and carts.
  • Libraries: fastapi, sqlalchemy
  • Hint: Include authentication and CRUD routes.

97. Currency Forecasting (ML)

  • Description: Predict future currency prices.
  • Libraries: pandas, scikit-learn, xgboost
  • Hint: Time-series forecasting with regression.

98. PDF Filler

  • Description: Automatically fill out PDF forms.
  • Libraries: pdfrw, reportlab
  • Hint: Replace placeholder fields with text.

99. Virtual Keyboard

  • Description: Type without a physical keyboard using webcam.
  • Libraries: opencv, mediapipe, pyautogui
  • Hint: Detect hand tap motion on screen.

100. AI-Powered Resume Builder

  • Description: Generate resume content based on user input and templates.
  • Libraries: jinja2, pdfkit, openai
  • Hint: Collect info, auto-fill HTML templates, convert to PDF.