def flip_num(my_nu):
   return '1' if(my_nu == '0') else '0';

def gray_to_binary(gray):
   binary_code = ""
   binary_code += gray [0]
   for i in range(1, len(gray)):

       if (gray [i] == '0'):
          binary_code += binary_code [i-1]
       else:
          binary_code += flip_num (binary_code [i-1])

   return binary_code
gray_code =“ 01101001”
print（“格雷码是：”）
print（gray_code）
print（gray_code的二进制码是，gray_to_binary(gray_code)）

格雷码是：
01101001
01101001的二进制码是01001110