python汉字和Unicode码(utf-8)之间的转换(Pack/Unpack)

保证你要转换的字符串编码为UTF8,如果不是,请iconv cnStr成utf8

1. $cnStr = "中"; //utf8的中文
2.  
3. //unicode
4. $code = unpack("H6codes", $cnStr);
5.  
6. //汉字
7. $cnStr = pack("H6", $code['codes']);

恩, pack/unpack很强大,, 和c语言交换数据, 二进制方式的序列化,操作二进制文件.. etc…

附上format参数的说明:

1. a      NUL-padded string, 即"\0"作为"空字符"的表示形式
2. A      SPACE-padded string, 空格作为"空字符"的表示形式
3. h      Hex string, low nibble first,升序位顺序
4. H      Hex string, high nibble first,降序位顺序
5. c      signed char, 有符号单字节
6. C      unsigned char, 无符号单字节
7. s      signed short (always 16 bit, machine byte order)
8. S      unsigned short (always 16 bit, machine byte order)
9. n      unsigned short (always 16 bit, big endian byte order)
10. v      unsigned short (always 16 bit, little endian byte order)
11. i      signed integer (machine dependent size and byte order)
12. I      unsigned integer (machine dependent size and byte order)
13. l      signed long (always 32 bit, machine byte order)
14. L      unsigned long (always 32 bit, machine byte order)
15. N      unsigned long (always 32 bit, big endian byte order)
16. V      unsigned long (always 32 bit, little endian byte order)
17. f      float (machine dependent size and representation)
18. d      double (machine dependent size and representation)
19. x      NUL byte, 实际使用的时候作为跳过多少字节用,很有用
20. X      Back up one byte, 后退1字节
21. @      NUL-fill to absolute position,实际使用的时候作为从开头跳到某字节用.