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A comprehensive collection of Python Programming Challenges (35+ Jupyter Notebooks) covering Beginner to Advanced topics, including Data Analysis, OOP, and Algorithms.
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Welcome to a curated roadmap of Python coding exercises designed to take you frombeginner toadvanced, one challenge at a time. This repository is built around Jupyter Notebooks for interactive learning.Python Documentation:https://docs.python.org/3/
Who is this for?
- Students looking tolevel up their core Python
- Developers practicing forcoding or analyst interviews
- Bootcampers buildingproject portfolios
- Anyone who wants to improve in astructured, concept-rich way
This repository offers a focused deep-dive into critical areas of Python programming:
- Data Structures & Algorithms
- Object-Oriented Programming (OOP)
- File Handling & Date/Time Operations
- Statistical Analysis & Data Manipulation (Pandas, NumPy)
- List Comprehensions & Functional Programming
Focus: Strings, math, loops, lists, dicts, conditionals
| # | Problem Description | Concepts Covered | Status |
|---|---|---|---|
| 1 | Check if number is divisible by 13 but not 5 | if,%,and, input | ✅ Done |
| 2 | Count frequency of each character in a string & sort | Loops,dict, sorting | ✅ Done |
| 3 | Count frequency of words in a sentence | .split(),dict, loop | ✅ Done |
| 4 | Convert decimal to binary manually | Math, loop, string logic | ✅ Done |
| 5 | Check if a string is a palindrome | String slicing | ✅ Done |
| 6 | Squares of even numbers using list comprehension | List comprehension | ✅ Done |
| 7 | Countdown to next birthday | datetime,timedelta | ✅ Done |
| 8 | Check Armstrong number | Math, loop, power op | ✅ Done |
| 9 | Reverse words in a sentence | .split(), slicing | ❌ Not Yet |
| 10 | Replace vowels in a string with# | Loop, string replace | ✅ Done |
| 11 | Find all prime numbers up toN | Loops, nestedif | ❌ Not Yet |
| 12 | Compute factorial (loop and recursion) | for,def, recursion | ✅ Done |
| 13 | Evaluate formula:Q = √((2×C×D)/H) from inputs | Math, user input | ✅ Done |
| 14 | Anagram checker (using freq dict) | Dict, sets, sorting | ✅ Done |
| 15 | Calculate LCM & HCF of two numbers | Math, GCD, loops | ✅ Done |
| 16 | Simulate robot movement in 2D plane with directions | Tuples,abs(), loop | ✅ Done |
| 17 | Run-Length Encoder (Convert aaabbccc → a3b2c3) | String compression, logic | ✅ Done |
| 18 | Calculate BMI for adults | Raise Error, Docstrings | ✅ Done |
Focus: Functions, nested data, CLI interfaces, intro to OOP
| # | Problem Description | Concepts Covered | Status |
|---|---|---|---|
| 1 | Create 2D matrix where [i][j] = i×j | Nested loops, 2D list | ✅ Done |
| 2 | Multiply 2 matrices manually | Loops, nested list | ✅ Done |
| 3 | Generate strong password | random, string, loop | ✅ Done |
| 4 | Rock-paper-scissors CLI game | CLI loop, random choice | ❌ Not Yet |
| 5 | Grocery billing with discounts + receipt generator | Loops, dict, formatting | ❌ Not Yet |
| 6 | Contact book (add/search/delete) | Dict of dicts, CLI menu | ✅ Done |
| 7 | Hotel room booking simulation | OOP, static method, date handling | ✅ Done |
| 8 | Replace words in paragraph | .replace(), string logic | ❌ Not Yet |
| 9 | Bank Account class with deposit, withdraw, PIN check | OOP (encapsulation) | ✅ Done |
| 10 | Frequency plot of letters in a sentence | ASCII art, count, loop | ❌ Not Yet |
| 11 | Recursive Fibonacci generator | recursion, math | ❌ Not Yet |
| 12 | Build a mini-dictionary CLI tool | Dict, file I/O | ❌ Not Yet |
| 13 | Validate random password rules | Conditions, loop | ❌ Not Yet |
| 14 | Quick math game (timer & scoring) | Game logic, random | ✅ Done |
| 15 | Analyze Sales Numbers usingpandas | pandas, summarization | ✅ Done |
| 16 | Expenses Split Calculator with distributed amounts | Math, rounding, functions | ✅ Done |
Focus: File handling, validation, pandas, JSON, games
| # | Problem Description | Concepts Covered | Status |
|---|---|---|---|
| 1 | Generate invoice with tax & discount | OOP, dict, formatting | ✅ Done |
| 2 | Hangman game (word bank, guesses, life system) | CLI game logic | ✅ Done |
| 3 | HandCricket game: toss → innings → result | Game loop, CLI | ✅ Done |
| 4 | Scientific calculator with logs to file | Math ops, Error handling, File Handling | ✅ Done |
| 5 | BMI calculator with logs to file | File append, math | ❌ Not Yet |
| 6 | Transaction logger with daily summary | File I/O, string format | ❌ Not Yet |
| 7 | Regex password strength checker | re module, validation | ❌ Not Yet |
| 8 | Read/write contact book to text file | file open(), dict parsing | ❌ Not Yet |
| 9 | Clean CSV, fill missing values | pandas,fillna,dropna | ❌ Not Yet |
| 10 | Read JSON, update values, and save | json module, I/O | ❌ Not Yet |
| 11 | Replace all duplicate chars with# | 2-pointer, greedy | ✅ Done |
| 12 | Statistical Analysis of a list of numbers | List, Filter, Sort, Statistics | ✅ Done |
| 13 | Sort top 5 earners from.csv file | pandas,sort_values() | ❌ Not Yet |
| 14 | Exhaustive Search for minima of a function | Math, plotting (optional) | ✅ Done |
Focus: External libraries, APIs, modular OOP, basic ML/NLP
| # | Problem Description | Concepts Covered | Status |
|---|---|---|---|
| 1 | Email validator + CLI signup system | Regex, CLI, validation | ❌ Not Yet |
| 2 | Fetch weather data from OpenWeather API | API calls,requests, JSON | ❌ Not Yet |
| 3 | Expense tracker with monthly summary | OOP, file, CLI tools | ❌ Not Yet |
| 4 | Convert sales CSV to JSON report | pandas, JSON, export | ❌ Not Yet |
| 5 | CLI tool to merge 2 files line-by-line | File reading, logic | ❌ Not Yet |
| 6 | Create a quiz app with score and levels | OOP, state, CLI | ❌ Not Yet |
| 7 | Income predictor using Linear Regression | sklearn, data prep | ❌ Not Yet |
| 8 | Sentiment analysis on product reviews | TextBlob,nltk | ❌ Not Yet |
| 9 | Income tax calculator (slabs + surcharge logic) | Conditions, formatting | ❌ Not Yet |
| 10 | Full OOP invoice system with session state | OOP,Streamlit, UI logic | ❌ Not Yet |
- Choose adifficulty level you're comfortable with.(Currently, there are 3 levels – more coming soon!)
- Each level folder containsJupyter Notebooks numbered as per the README.
- Every notebook includes areal-world coding problem, followed by its solution.Try solving the problem yourself before peeking at the solution.
- The problems aremini Python projects designed to mimic real-world use cases you might encounter during interviews, freelancing, or product development.
- The
Assets/folder contains all necessary input datasets and output/reference files. - You’ll findopen Issues with additional problem suggestions — feel free to attempt them!
- Fork this repo and raise a PR to add your own problem variants or improvements!
python beginner exercises,python coding problems,oop python practice,interview prep python,real world python mini projects,file io pandas python,python games and utilities
- Jupyter Notebook / VS Code / Spyder
- Python ≥ 3.9
pandas,requests,textblob,random,math
- Want to add more problems?
- Found a bug in a solution?
- Submit a Pull Request 🚀
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A comprehensive collection of Python Programming Challenges (35+ Jupyter Notebooks) covering Beginner to Advanced topics, including Data Analysis, OOP, and Algorithms.
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