A wonderful collection of Python tools for Data Science by Alex Wang.

🐍 Python Roadmap 🐍

1️⃣ Foundations 🏗
• Syntax: Variables, Data Types, Operators
• Control Flow: if, else, loops 🌀
• Functions: def, parameters, return values 🔧
• Collections: Lists, Tuples, Sets, Dictionaries 🔑

2️⃣ Intermediate 🧠
• OOP: Classes, Inheritance, Polymorphism 👨‍💻
• Error Handling: try, except, Custom Exceptions 🚫
• File Handling: Read/Write Files 📁
• Modules: import, third-party libraries 📦

3️⃣ Advanced 🚀
• Decorators: Modify functions 🔄
• Generators: Efficient iteration 🔄
• Context Managers: with statements 🔑
• Multithreading: Parallel tasks 🧑‍💻

4️⃣ Frameworks & Tools 🧰
• Web Dev: Flask/Django ⚡️
• Testing: unittest, pytest 🧪
• Data Science: Jupyter, Matplotlib 📈
• DevOps: Docker 🐳, AWS SDK 🌥

5️⃣ Real-World Projects 🛠
• Web Scraper: Collect data from websites (e.g., stock prices, weather) 🌐
• Task Manager App: Track your to-dos with a simple UI 🗂
• Blog Website: Build a full-stack blog with Flask/Django ✍️
• Chatbot: Create a simple FAQ bot using Python libraries 🤖
• Portfolio Website: Showcase your projects and skills 💻
• E-commerce Website: Basic shopping cart system 🛍

6️⃣ Best Practices 💡
• Clean Code: PEP 8, Readability 📝
• Version Control: Git/GitHub 🌍
• CI/CD: Automate testing & deployment 🚀
• Algorithms: Sorting, Searching ⚙️

📅 Timeline
• 1–3 months: Basics
• 3–6 months: Intermediate + Small Projects
• 6–12 months: Advanced Topics & Large Projects
• Ongoing: Open Source & Practice 🎯

📝 Tip: Always keep building, experimenting, and learning! 🚀

PS. Sorry we took short break, we are back to posting and learning 😊

Slicing Strings
┌───┬───┬───┬───┬───┬───┬───┐
| m | y | b | a | c | o | n |
└───┴───┴───┴───┴───┴───┴───┘
0   1   2   3   4   5   6  
-7  -6   -5  -4  -3  -2  -1

>>> s = 'mybacon'
>>> s[2:5]
'bac'
>>> s[0:2]
'my'

```python
>>> s = 'mybacon'
>>> s[:2]
'my'
>>> s[2:]
'bacon'
>>> s[:2] + s[2:]
'mybacon'
>>> s[:]
'mybacon'

python
>>> s = 'mybacon'
>>> s[-5:-1]
'baco'
>>> s[2:6]
'baco'`

Top Python tricks for efficient programming

Strings

Trick 6: Reversing the string

a=”python”
print(“Reverse is”, a[::-1])

Output:
Reverse is nohtyp

Trick 7: Splitting the string

a="Python is the language of the future"
b=a.split()
print(b)

Output:
[‘Python’, ‘is’, ‘the’, ‘language’, ‘of’, 'the’, ‘future’]

Trick 8: Printing out multiple values of strings

print(“on”*3+’ ‘+”off”*2)

Output:
ononon offoff

Trick 9: Creating a single string

a = [“I”, “am”, “not”, “available”]
print(“ “.join(a))

Output:
I am not available

Trick 10: Checking if two words are anagrams

from collections import Counter
def is_anagram(str1, str2):
return Counter(str1) == Counter(str2)
print(is_anagram(‘taste’, ‘state))
print(is_anagram(‘beach’, ‘peach’))

Output:
True
False

PYTHON CHEATSHEET
FOUNDATION IN PYTHON PROGRAMMING

Python CheatSheet & 30 Projects to Level Up Your Skills 🚀

Looking to improve your Python skills? Here are 30 project ideas (10 Easy, 10 Medium, 10 Advanced) to help you get hands-on experience. Each project includes a quick description and the libraries you'll need. Let’s code! 👨‍💻👩‍💻

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🟢 𝐄𝐚𝐬𝐲 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬

1. To-Do List App: A simple app to add, remove, and track tasks. (Flask, SQLite)
2. Weather App: Fetch and display weather updates for any city. (Requests, Tkinter)
3. Basic Calculator: GUI-based calculator for basic arithmetic. (Tkinter)
4. Password Generator: Generate random secure passwords. (random, string)
5. Dice Roller Simulator: Simulates rolling dice with random numbers. (random)
6. Number Guessing Game: A fun CLI game to guess a random number. (random)
7. URL Shortener: Shorten URLs with a simple interface. (pyshorteners)
8. PDF Merger: Combine multiple PDFs into one. (PyPDF2)
9. Email Slicer: Extract username and domain from email addresses. (re)
10. Unit Converter: Convert units (e.g., length, weight) in a GUI app. (Tkinter)

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🟡 𝐌𝐞𝐝𝐢𝐮𝐦 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬

11. Blog CMS: A small content management system for blogs. (Flask/Django, SQLite)
12. Chat Application: Real-time chat with friends. (Socket, Tkinter)
13. File Organizer: Automatically organize files into folders. (os, shutil)
14. Expense Tracker: Track and categorize daily expenses. (Pandas, Tkinter)
15. Snake Game: Build the classic snake game. (Pygame)
16. Image Resizer: Resize and optimize images in bulk. (Pillow)
17. Markdown to HTML: Convert markdown files into HTML. (markdown2)
18. PDF to Audio: Convert PDF text into speech. (PyPDF2, pyttsx3)
19. Data Scraper: Scrape data from websites. (BeautifulSoup, Requests)
20. Quiz Application: A timed quiz with score tracking. (Tkinter, random)

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🔴 𝐀𝐝𝐯𝐚𝐧𝐜𝐞𝐝 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬

21. E-commerce Website: A full-stack shopping platform. (Django, Stripe)
22. Chatbot with AI: Create a conversational chatbot. (ChatterBot, NLTK)
23. Stock Price Predictor: Predict stock trends using ML. (Pandas, Scikit-learn)
24. Social Media Dashboard: Analyze your social media stats. (Tweepy, Matplotlib)
25. Custom Voice Assistant: Build an Alexa-like voice assistant. (speech_recognition, pyttsx3)
26. Face Recognition App: Identify faces in images or videos. (OpenCV, face_recognition)
27. Game AI (Tic-Tac-Toe): Implement AI for tic-tac-toe. (Minimax Algorithm)
28. Weather Forecast App: Predict weather using APIs and ML. (Flask, OpenWeatherMap API)
29. Task Automation Bot: Automate tasks like emails or file management. (Selenium, Schedule)
30. Music Streaming App: Build a music app with playlists. (Flask/Django, SQLite)

PYTHON FOR EVERYTHING