PYTHON KEY POINTS
📘 Python Technical Notes (Cheat Sheet) 1. Python Basics 1.1 Data Types & Conversions Check datatype: type(variable) Check length: len(variable) Case conversion: variable.isupper() variable.islower() variable.upper() variable.lower() Type casting: int1 = 500 str(int1) # "500" String formatting: print("----{ }--------{ }".format(val1, val2)) 2. Python Data Structures 🔹 1️⃣ LISTS Declaration: list1 = [] # empty list list2 = [1, 2, 3, 'a'] # heterogeneous list3 = list((10, 20, 30)) # using list() constructor Properties: ✅ Ordered ✅ Mutable (modifiable) ✅ Allows duplicates ✅ Supports indexing & slicing 🔸 Common Operations: Operation Description Example append(x) Add single element at end list1.append(5) extend(iterable) Add multiple elements list1.extend([6,7]) insert(i, x) Insert at index i list1.insert(1, 99) remove(x) Remove first occurrence of x list1.re...