Learn Python through simple, practical examples and real coding ideas. Clear explanations, useful snippets, and hands-on learning for anyone starting or improving their programming skills.
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Learn Python Coding
May 23, 2026, 08:49 AM
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Why can't you use mutable default values in constructors?
If you set a list or dictionary as the default value, the object is created once and then reused by all instances.
class User:
def __init__(self, tags=[]):
self.tags = tags
This results in a change in one instance affecting the others:
u1 = User(); u2 = User()
u1.tags.append("x"); print(u2.tags)
default_factory creates a new object each time the constructor is called, eliminating shared state:
field(default_factory=list)
Thus, each instance receives an independent data structure:
User().tags is User().tags
🔥 Using default_factory is an important practice when working with mutable types and prevents hard-to-detect state errors.
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Learn Python Coding
May 23, 2026, 08:49 AM
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😎 The Algorithms Python — a huge collection of algorithms in Python! 🐍
The repository contains a large number of algorithms and data structures: sorting, graphs, trees, search, dynamic programming, cryptography, and much more. Everything is implemented in pure Python with clear code and a convenient structure. It's perfect for studying algorithms through real examples.
I'll leave a link: GitHub
https://github.com/TheAlgorithms/Python
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Learn Python Coding
May 23, 2026, 08:49 AM
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Unlock Your AI Career
Join our Data Science Full Stack with AI Course – a real-time, project-based online training designed for hands-on mastery.
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Learn Python Coding
May 23, 2026, 08:49 AM
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Python Basics Arrays & Loops 🐍
Essential you need to start strong 💪
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Learn Python Coding
May 23, 2026, 08:49 AM
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Python: simple things that improve code
If you write like this:
if type(x) == str:
print("This is a string")
it might work, but it breaks on subclasses of str.
It's better to use isinstance(). It takes into account inheritance and is more consistent with polymorphism.
if isinstance(x, str):
print("This is a string")
This variant will work for str and its subclasses.
Conclusion: type(x) == str is only suitable for simple cases, but it's fragile. isinstance(x, str) is a more stable and correct option almost always.
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Learn Python Coding
May 23, 2026, 08:49 AM
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📂 Reminder on Python data structures!
For example, a list supports indexing, is mutable, and stores duplicates, while a set stores only unique elements and has no order.
The picture shows a brief summary of the main data types and their properties: order, mutability, duplicates, and indexing.
Save it to remember!
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Learn Python Coding
May 23, 2026, 08:49 AM
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Master Python the Right Way – Without Procrastination. 🐍✨
When I first started learning Python, I quickly realized:
You can't master a programming language just by reading syntax or watching tutorials. 📚🚫
Real growth happens when you practice, build, and solve problems on your own. 🛠💻
That's exactly why I've compiled a collection of Python programs – designed to take you from basics to advanced logic-building. 📈🧠
What is this collection about? 🤔
✔️ Beginner to advanced programs with clear explanations
✔️ Pattern-based exercises to strengthen core fundamentals
✔️ Problem-solving programs that sharpen logical thinking
Why is this important? 🌟
You don't just learn "how to code", you start learning "how to think like a programmer". 🧠⚡️
This is perfect for: 🎯
• Preparing for technical interviews 🤝
• Participating in coding challenges 🏆
• Building real-world Python projects 🚀
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Learn Python Coding
May 23, 2026, 08:49 AM
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There's a floating-point number in Python and you need to output it as a percentage - use the % format in the f-string
x = .023
print(f'{x:.2%}') # 2.30%
x = .02375
print(f'{x:.2%}') # 2.38% -- rounded off!
x = 1.02375
print(f'{x:.2%}') # 102.38%
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Learn Python Coding
May 23, 2026, 08:49 AM
Lesson: Mastering Python Lists: Common Pitfalls and Best Practices 🐍 1. The Peril of Shallow Copies: Understanding References 🧠 Description: When you assign one list to another using =, you're not creating a new list; you're creating a new reference to the…
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Learn Python Coding
May 23, 2026, 08:49 AM
🎥 Video
🧐 Python Cheatsheet — a convenient cheat sheet for Python that really saves time at work!
The repository contains a summary of key topics: from basic syntax and data structures to working with files, environments, and OOP with classes and magic methods. Everything is presented compactly, without unnecessary theory, with examples that can be immediately applied in code.
Repo: https://github.com/onyxwizard/python-cheatsheet
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