Convert elements of a list into binary

You can use bitwise operators like this:

>>> lst = [0, 1, 0, 0]
 >>> bin(int(''.join(map(str, lst)), 2) << 1)
'0b1000'

This is not a fancy one-liner, but simple and fast.

lst = [0,1,1,0]

num = 0
for b in lst:
    num = 2 * num + b
print(num) # 6