python获取一组汉字拼音的首字母

python获取一组汉字拼音的首字母
来源：http://wangwei007.blog.51cto.com/68019/983289
作者：lover007

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
def multi_get_letter(str_input): 
     
    if isinstance(str_input, unicode): 
        unicode_str = str_input 
    else: 
        try: 
            unicode_str = str_input.decode('utf8') 
        except: 
            try: 
                unicode_str = str_input.decode('gbk') 
            except: 
                print 'unknown coding' 
                return 
     
    return_list = [] 
    for one_unicode in unicode_str: 
        return_list.append(single_get_first(one_unicode)) 
    return return_list 
 
def single_get_first(unicode1): 
    str1 = unicode1.encode('gbk') 
    try:         
        ord(str1) 
        return str1 
    except: 
        asc = ord(str1[0]) * 256 + ord(str1[1]) - 65536 
        if asc >= -20319 and asc <= -20284: return 'a' if asc >= -20283 and asc <= -19776: return 'b' if asc >= -19775 and asc <= -19219: return 'c' if asc >= -19218 and asc <= -18711: return 'd' if asc >= -18710 and asc <= -18527: return 'e' if asc >= -18526 and asc <= -18240: return 'f' if asc >= -18239 and asc <= -17923: return 'g' if asc >= -17922 and asc <= -17418: return 'h' if asc >= -17417 and asc <= -16475: return 'j' if asc >= -16474 and asc <= -16213: return 'k' if asc >= -16212 and asc <= -15641: return 'l' if asc >= -15640 and asc <= -15166: return 'm' if asc >= -15165 and asc <= -14923: return 'n' if asc >= -14922 and asc <= -14915: return 'o' if asc >= -14914 and asc <= -14631: return 'p' if asc >= -14630 and asc <= -14150: return 'q' if asc >= -14149 and asc <= -14091: return 'r' if asc >= -14090 and asc <= -13119: return 's' if asc >= -13118 and asc <= -12839: return 't' if asc >= -12838 and asc <= -12557: return 'w' if asc >= -12556 and asc <= -11848: return 'x' if asc >= -11847 and asc <= -11056: return 'y' if asc >= -11055 and asc <= -10247: 
            return 'z' 
        return '' 
 
def main(str_input): 
    a = multi_get_letter(str_input) 
    b = '' 
    for i in a: 
        b= b+i 
    print b 
if __name__ == "__main__": 
    str_input=u'欢迎你' 
    main(str_input)