Swap 2 Variables in Python without using the 3rd temporary variable?

You can do it using parallel assignment. Check below code:

a, b = 10, 20
print("Before Swapping:", a, b)

# This kind of assignment is called a parallel assignment
a, b = b, a 

print("After Swapping:", a, b)

Output:

Before Swapping: 10 20
After Swapping: 20 10