Jun 01
Python Slicing — [start:stop:step] Visualized
"hello"[::2] # → "hlo" What does each position mean? Let’s break it down. The Three Slots sequence[ start : stop : step ] Slot …
Beginner
2026
Jun 01
Python Dunder Methods — __init__, __str__, __call__ and Friends
Dunder (double-underscore) methods let your objects hook into Python’s built-in operations. They’re what makes len(obj), str(obj), …
May 31
List Comprehension vs Generator in Python
Two of Python’s most elegant features — list comprehensions and generator expressions. Both build sequences from existing iterables, but they …
May 31
@classmethod vs @staticmethod vs Plain Instance Method
Three ways to define a function inside a class. Each serves a different purpose. class Demo: # ── Instance method (no decorator) ── def regular(self, …
May 30
Binary Search — Correctness, Prerequisites & Common Pitfalls
Prerequisite The input must be sorted ascending. Binary search exploits ordering to halve the search space each step — if the list isn’t sorted, …