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In Day 11, we cover two extremely important (and often ignored) topics in Python: Membership operators and Bitwise operators. What you’ll learn in this lesson: Membership Operators Using in and not in Checking items in lists and tuples Real example: filtering a bulk list into: invited users non-invited users Practical use cases like validation, filtering, access control Bitwise Operators (with binary logic) & Bitwise AND | Bitwise OR ^ Bitwise XOR ~ Bitwise NOT Left Shift Right Shift Understanding binary representation Why ~5 becomes -6 (two’s complement explained) Real-world permission system using bit flags: READ WRITE DELETE Checking permissions using bitwise AND Converting numbers to binary using format() This is not just Python — this is how systems, permissions, and performance logic work. ==== HOMEWORK [DAY - 11] ===== 1. Membership Warm-up Create a list: items = ["pen", "book", "laptop", 100] Write conditions to check: if "laptop" is in the list if "phone" is not in the list Print meaningful messages, not just True/False. 2. Guest List Filter (Core Task 🔥) Create: friends = ["Aman", "Rohit", "Neha"] guests = ["Rohit", "Kunal", "Aman", "Priya"] Using a loop and membership operators: create allowed_list create blocked_list Print both lists clearly. 3. Remove Duplicates Logic (Think Mode) Given: bulk_names = ["A", "B", "A", "C", "B"] Create a new list that stores only unique names (use in, not in, loops — no new concepts). 4. Bitwise Playground Given: a = 5 b = 6 Print results of: a & b a | b a ^ b ~a a shift left 1 b shift right 1 Also print their binary form using format(num, "08b"). 5. Mini Project: Permission System 🛡️ Define: READ = 0b001 WRITE = 0b010 DELETE = 0b100 Create a variable user_perm that has: READ + WRITE access Check using bitwise AND: Can user read? Can user write? Can user delete? Print permissions clearly. _______________________________________ Send the homework directly in my email: [email protected] and inform the name in comment. _______________________________________ #PythonInHindi #PythonBasics #LearnPython #ProgrammingInHindi