>>> l = [10, 8, 4, 4, 13, 1, 1, 1, 1, 6, 1, 2, 1, 1, 0, 1, 5, 1, 5, 5, 2, 1, 0, 0, 4]
>>> [1 if x > 0 else 0 for x in l]
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1]
if you want to change existing list
for i, x in enumerate(l):
if x >= 1: l[i] = 1