计算文件的海明码

Question

我试图用Hamming代码（python语言）对.txt文件中的数据进行编码。我该怎么办？我需要逐行读出数据，转换成ascii字符，然后在上面计算汉明码吗。或者python中是否有任何函数或库可以作为一个窗口来操作整个文件？在

非常感谢你的答复。比你提前。在

编辑： 该场景是一个客户机-服务器体系结构。客户机在计算完数据的汉明码后尝试将文件上载到服务器，并将其存储在服务器中。稍后，当它试图检索回文件时，它会检查hamming代码并检测可能发生的任何错误。在

Answer 1

使用映射：

# create a dict that maps input bytes to their hamming-encoded version.  This
# can be pre-calculated and hard-coded, or generated at startup
hamming = {
    0x00: 0x0000, # these numbers are nonsense.  Input byte 0x00 is
                  # being mapped to output bytes 0x0000
    0x01: 0x0101,
    ...
    0xff: 0x10cf
}

# read the source binary file
with open('input.bin', 'r') as infile:
    data = [int(x) for x in infile.read()]

# translate the input data into its encoded form (1 byte becomes 2 with parity added, etc)
output = ''
for byte in data:
    encoded = hamming[byte]
    output += chr((encoded >> 8) & 0xff)
    output += chr((encoded >> 0) & 0xff)

# write the encoded data to a file
with open('output.bin', 'w') as out:    
    out.write(output)

除了这里的任何错误和低效之外，您可以在dict hamming中定义256个条目。在