How can I generate all the possible binary lists with 4 elements? (Using Python)

I'm wondering is there a way I can generate a list whose sublists are all the possible combinations of 0 and 1 with 4 elements? To generate an individual sublist, I have

import random
binum = np.random.randint(2, size=4).tolist()

But how can I get a full list to contain all the possible sublists, each appears once? So the desired output looks like:

[[0,0,0,0],[0,0,0,1]...[1,0,0,1]...[1,1,1,1]]

(There're 16 elements in total for this case). Thanks:)