Python assignments are by references

When assigning a variable (or name) in Python, you are creating a reference, have a look at below:

CODE:

a=[1,2]

b=a

print("Before append: ", b)

b.append(3)

print("Shows a & b are same references, after append to b, a: ", a)

OUTPUT:

Before append:  [1, 2]

Shows a & b are same references, after append to b, a:  [1, 2, 3]