return first pinyin letter of chinese word

firstpinyin.py

# coding: utf-8

a=[ i.decode('utf8').encode('gbk') for i in 
     ['澳', '怖', '错', '堕', '贰', '咐', '过',
      '祸', '祸', '骏', '阔', '络', '穆', '诺',
      '沤', '瀑', '群', '弱', '所', '唾',
      '唾', '唾', '误', '褕', '孕', '座',] ]

def firstpy(s,code='utf8'):
    s=s.decode(code).encode('gbk')
    i=0
    while i<26 and a[i]<s:
        i+=1
    return '%c' % (97+i)

if __name__=='__main__':
    s='判断字符串首字母'
    for i in range(0,len(s),3):
        print firstpy(s[i:i+3]),