python merge two lists (even/odd elements)

Question

Given two lists, I want to merge them so that all elements from the first list are even-indexed (preserving their order) and all elements from second list are odd-indexed (a

Answer 1

Try this:

x = [0,1,2,10,11]
y = [3,4]

n =  2*max([len(x),len(y)])
res = n *[None]
res[:2*len(x):2] = x
res[1:2*len(y):2] = y
res = [x for x in res if x!=None]
print res

It should work for unevenly long lists.