Appending a list to itself in Python

Question

I want to attach a list to itself and I thought this would work:

x = [1,2]
y = x.extend(x)
print y

I wanted to get back [1,2,1,2]

Answer 1

x.extend(x) does not return a new copy, it modifies the list itself.

Just print x instead.

You can also go with x + x