from pypinyin import lazy_pinyin, Style
import re
def getab(str_data):
    tmpab= ''.join(lazy_pinyin(str_data, style=Style.FIRST_LETTER))
    #return tmpab.upper()
    tmpab=tmpab.upper()
    tmpab=re.sub("[^A-Za-z]", "", tmpab)
    return tmpab
print(getab("*ST华谊兄弟"))