How do I decompose a number into powers of 2?

Question

I\'m trying to create a function that receives a number as an argument and performs actions on that number to find out its closest powers of 2 that will then add up to that

Answer 1

Most efficient way of doing this:

def myfunc(x):
    powers = []
    i = 1
    while i <= x:
        if i & x:
            powers.append(i)
        i <<= 1
    return powers