python yield

def bruteForceLeft(selected,index):
    if index==len(left):
        #print(selected)
        yield selected
    else:
        selected[0].append(left[index])
        bruteForceLeft(selected,index+1)
        selected[0].pop()
        bruteForceLeft(selected,index+1)

for option in bruteForceLeft(([],[]),0):
    print(option)