大写字母单词计数python

Question

现在，我的代码打印出txt文件中每个单词使用了多少次。 我正在尝试使其仅打印txt文件中与大写字母一起使用的前3个单词...

file=open("novel.txt","r+")
wordcount={}
for word in file.read().split():
    if word not in wordcount:
        wordcount[word] = 1
    else:
        wordcount[word] += 1
for a,b in wordcount.items():
    print (b, a)

Answer 1

首先，您想使用str.istitle()将结果限制为仅大写的单词：

file=open("novel.txt","r+")
wordcount={}
for word in file.read().split():
    if word.istitle():
        if word not in wordcount:
            wordcount[word] = 1
        else:
            wordcount[word] += 1
for a,b in wordcount.items():
    print (b, a)

然后使用sorted() 对结果进行sorted()并打印出前三个：

file=open("novel.txt","r+")
wordcount={}
for word in file.read().split():
    if word.istitle():
        if word not in wordcount:
            wordcount[word] = 1
        else:
            wordcount[word] += 1

items = sorted(wordcount.items(), key=lambda tup: tup[1], reverse=True) 

for item in items[:3]:
    print item[0], item[1]

Answer 2

在Collections有一个Counter类。 https://docs.python.org/2/library/collections.html 。

cnt = Counter([w for w in file.read().split() if w.lower() != w]).most_common(3)