Generate List Combinations Using Bitwise Arithmetic

main.py

def combinate(list_):
    """Generate all combinations of a list(unordered)"""
    combinations = []
    for count in range(1, 2**len(list_)):
        combinations.append(
            [elem for cur_index, elem in enumerate(list_)
             if (count >> cur_index) & 1]
        )
    return combinations