根據A列和B列，生成C列

import xlrd
from xlutils.copy import copy

def main():
    rb = xlrd.open_workbook('xxx.xls')
    rs = rb.sheet_by_index(0)
    code_dict = {rs.row_values(i)[1]:rs.row_values(i)[0] for i in range(rs.nrows) if i > 0}
    full_code_dict = {}
    for key in code_dict.keys():
        key_split = key.split('-')
        if len(key_split) > 1:
            full_text = ""
            for i in range(len(key_split)):
                if full_text != "":
                    full_text += "-"
                temp_key = "-".join(key_split[0:i+1])
                if temp_key in code_dict.keys():
                    full_text += code_dict[temp_key]
            full_code_dict[key] = full_text
        else:
            full_code_dict[key] = code_dict[key]
    wb = copy(rb)
    ws = wb.get_sheet(0)
    for i in range(rs.nrows):
        if i > 0:
            ws.write(i, 2, full_code_dict[rs.row_values(i)[1]])
    wb.save('xxx_new.xls')

if __name__ == '__main__':
    main()