def __add__(self, appendix):
    'Appends two binary codes via addition +.\n\n        Args:\n            appendix (BinaryCode): The code to append to the present one.\n\n        Returns (BinaryCode): global binary code\n        '
    twin = copy.deepcopy(self)
    twin += appendix
    return twin
Appends two binary codes via addition +.

Args:
    appendix (BinaryCode): The code to append to the present one.

Returns (BinaryCode): global binary code
def __add__(self, appendix):
    'Appends two binary codes via addition +.\n\n        Args:\n            appendix (BinaryCode): The code to append to the present one.\n\n        Returns (BinaryCode): global binary code\n        '
    twin = copy.deepcopy(self)
    twin += appendix
    return twin