利用jieba库分析《三国演义》人物频次。

#CalThreeKingdomsV2.py
import jieba

txt = open("threekingdoms.txt", "r", encoding = "utf-8").read()
excloudes = {
   "将军","却说","荆州","二人","不可","不能","如此","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","都督","人马","不知"}
words = jieba.lcut(txt)
counts = {
   }

for word in words:
    if len(word)==1:
        continue
    elif word == "诸葛亮" or word == "孔明曰":
        rword ="孔明"
    elif word == "关公" or word == "云长":
        rword = "关羽"
    elif word == "玄德" or word == "玄德曰":
        rword = "刘备"
    elif word == "孟德" or word == "丞相":
        rword = "曹操"
    else:
        rword = word        
    counts[rword]= counts.get(rword,0) + 1

for word in excloudes:
    del counts[word]

items = list(counts.items())
items.sort(key=lambda x:x[1],reverse=True)
for i in range(10):
    word, count = items[i]
    print("{0:<10}{1:>5}".format(word,count))

结果显示
曹操 1451
孔明 1383
刘备 1252
关羽 784
张飞 358
吕布 300
赵云 278
孙权 264
司马懿 221
周瑜 217

问题：
“丞相”一词在《三国演义》里最开始不是称呼曹操的，而是董卓的。
小说中很多人物有官称、小名等称呼，这些如何计算。
很多人的官职重复，比如说“都督”这个词，不仅指周瑜。