Move all zeroes to the beginning of a list in Python

Question

I have a list like below:

a = [4, 5, 0, 0, 6, 7, 0, 1, 0, 5]

and I want to push all zeroes to the beginning of that list. The result must

Answer 1

Try this simple process:-

from collections import deque
a = [4, 5, 0, 0, 6, 7, 0, 1, 0, 5]
b = deque([x for x in a if x!=0])
for i in a:
    if i==0:
        b.appendleft(0)
print list(b)
#output -> [0, 0, 0, 0, 4, 5, 6, 7, 1, 5]