def flip_bin_string(bin_str: str):
    """
    This function will flip(invert) each of the bits in a given binary string without prefix.
     i.e. "0" becomes "1" and vice versa;
    :param bin_str: A binary string without prefix to flip
    :return: A binary data represented as string
    """
    flipped_bin_str = ""
    for bit in bin_str:
        flipped_bin_str += str(1 - int(bit))
    return flipped_bin_str