能帮我找找bug吗？不知道哪里错了

import jieba
#import wordcloud
txt=open("f:\threekingdoms.txt",'r',encoding='utf-8')
words=jieba.lcut(txt)
counts={}
for word in words:
if len(word)==1:
continue
else:
counts[word]=counts.get(word,0)+1
items=list(counts.items())
items.sort(key=lambda x:x[1],reverse=True)
for i in range (15):
word,count=items[i]
print("{0:<10}{1:>5}".format(word,count))

把文件那行换成这样就可以啦

txt = open("f: \\threekingdoms.txt", 'r', encoding=' utf-8 ').read()

应该加一行读文件的代码
或者下一行括号里的txt改为txt.read()