python - 打印最长单词的长度时出错？

Question

我正在编写一个函数，该函数应该打印出文本文件中最大的 3 个单词。打印出这 3 个单词后，我应该创建一个函数来说明这些单词中有多少个字符。三个最大的单词是 13 个字符，但出于某种原因我的程序说它们是 11 个字符。

这是我的程序:

def main():
    real_longest = ['']
    filename = input("What is the filename?")
    with open(filename) as f:
        linenum = 1
        for line in f:
            words = line.split()
            longest = ''
            for word in words:
                if len(longest) < len(word):
                    longest = word
            print("Line", linenum, "has", longest, "as the longest word.")
            if len(longest) > len(real_longest[0]):
                real_longest = [longest]
            elif len(longest) == len(real_longest[0]):
                real_longest.append(longest)
            linenum += 1
            print(longest)
    with open(filename) as f:
        for word in real_longest:
            print("This word is one of the largest:", word)
            print(len(longest))

main()

这是它返回的内容:

What is the filename?test.txt
Line 1 has Working as the longest word.
Working
Line 2 has possibilities as the longest word.
possibilities
Line 3 has scrambled as the longest word.
scrambled
Line 4 has letters. as the longest word.
letters.
Line 5 has  as the longest word.

Line 6 has difficulties as the longest word.
difficulties
Line 7 has permutations. as the longest word.
permutations.
Line 8 has signature as the longest word.
signature
Line 9 has permutations. as the longest word.
permutations.
Line 10 has unscrambled as the longest word.
unscrambled
This word is one of the largest: possibilities
11
This word is one of the largest: permutations.
11
This word is one of the largest: permutations.
11

Answer 1

那是因为你没有打印 word 的长度，而是打印了 longest 变量的长度，它指向最后一行中最长的单词(不是文件中真正最长的单词)，在特定示例中 - 'unscrambled' ，因此长度为 11。

您应该打印单词的长度。示例 -

with open(filename) as f:
    for word in real_longest:
        print("This word is one of the largest:", word)
        print(len(word))       # <---------- changed here from `len(longest)` .