def str_display_width(s):
    '''
        from elist.utils import *
        str_display_width('a')
        str_display_width('去')
    '''
    s= str(s)
    width = 0
    len = s.__len__()
    for i in range(0,len):
        sublen = s[i].encode().__len__()
        sublen = int(sublen/2 + 1/2)
        width = width + sublen
    return(width)
from elist.utils import *
        str_display_width('a')
        str_display_width('去')