optimization.py 文件源码

def index_2_bit(state_index, num_bits):
    """Returns bit string corresponding to quantum state index

    Args:
        state_index : basis index of a quantum state
        num_bits : the number of bits in the returned string
    Returns:
        A integer array with the binary representation of state_index
    """
    return np.array([int(c) for c
                     in np.binary_repr(state_index, num_bits)[::-1]],
                    dtype=np.uint8)