三国演义人物出场次数统计

统计中文词频需要用到python中的jieba库，用cmd模式下的pip install jieba命令安装好jieba库，下载好三国演义的文档并保存。注意，三国演义文档要保存为以下编码，否则出现错误。（用的python3.6 64位）
代码如下：

#CalThreeKingdoms.py
import jieba
txt = open("threekingdoms.txt",'r+',encoding="utf-8").read()
excludes = {"将军","却说","荆州","二人","不可","不能","如此",#排除不是人名的词语
            "商议","如何","主公","军士","左右","军马","引兵",
            "次日","大喜","天下","东吴","于是","今日","不敢",
            "魏兵","陛下","一人","不知","都督","人马","汉中","大军",
            "