| __all__ = ["popCount", "bit_count", "bit_indices"] | |
| try: | |
| bit_count = int.bit_count | |
| except AttributeError: | |
| def bit_count(v): | |
| return bin(v).count("1") | |
| """Return number of 1 bits (population count) of the absolute value of an integer. | |
| See https://docs.python.org/3.10/library/stdtypes.html#int.bit_count | |
| """ | |
| popCount = bit_count # alias | |
| def bit_indices(v): | |
| """Return list of indices where bits are set, 0 being the index of the least significant bit. | |
| >>> bit_indices(0b101) | |
| [0, 2] | |
| """ | |
| return [i for i, b in enumerate(bin(v)[::-1]) if b == "1"] | |