🔹 Identity & Membership Operators

Last Updated: 16th August 2025

  • Membership operators check if a value exists inside a sequence (string, tuple,etc).
  • Identity operators check if two variables refer to the same object in memory.

Hinglish Tip 🗣: Identity = “kya dono same cheez ko point kar rahe hain?”
Membership = “kya yeh value sequence ke andar hai?”

🔎 Membership Operators

# String membership (case-sensitive)
name = "Python"
print("P" in name)        # True
print("py" in name)       # False (case matters)
print("z" not in name)    # True

# Tuple membership
nums = (10, 20, 30)
print(20 in nums)         # True
print(25 in nums)         # False

Hinglish Tip 🗣: Membership exact match hota hai; strings me uppercase/lowercase ka farq padta hai.

🔐 Identity Operators

# Best practice: check None with 'is'
x = None
print(x is None)      # True
print(x is not None)  # False

# Identity vs equality
a = (1, 2)   # tuple
b = (1, 2)   # another tuple with same values
c = a        # c points to the same object as a

print(a == b)   # True  (values equal)
print(a is b)   # False (different objects)
print(a is c)   # True  (same object)

# Memory address Printing ,Every object has a same memory address
print(id(a), id(b), id(c)

Hinglish Tip 🗣: == values compare karta hai, is object identity (memory) compare karta hai.

💡 Quick Practice

  • For word = "developer", check: "dev" in word, "D" in word, "z" not in word.
  • Create code = None and print whether code is None.
  • Exercises
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