ZeroDivisionError ，但我找不到错误

Question

我遇到了一个小错误，但我找不到它。我的目的是比较包含这些单词的文本文件。

secondly
pardon
woods
secondly

我编写了这样的脚本来比较这两个值：

secondly, pardon
secondly, woods
secondly, secondly
pardon, woods
pardon, secondly
woods, secondly

我的代码执行以下操作：

1) 如果单词相同，则得分为 1，否则为 gensim 向量模型计算的得分 2) 有一个计数器，当第一个 for 循环移动到下一个字时，计数器将复位。 eg, 其次, pardon > 其次, woods > 其次, 其次(此时计数为3)

代码

from __future__ import division
import gensim


textfile = 'businessCleanTxtUniqueWords'
model = gensim.models.Word2Vec.load("businessSG")
count = 0  # keep track of counter
score = 0
avgScore = 0
SentenceScore = 0
externalCount = 0
totalAverageScore = 0

with open(textfile, 'r+') as f1:

    words_list = f1.readlines()

    for each_word in words_list:
        word = each_word.strip()

        for each_word2 in words_list[words_list.index(each_word) + 1:]:
            count = count + 1

            try:
                word2 = each_word2.strip()
                print(word, word2)
                # if words are the same
                if (word == word2):
                    score = 1
                else:
                    score = model.similarity(word,word2) # when words are not the same
            # if word is not in vector model
            except KeyError:
                score = 0
            # to keep track of the score
            SentenceScore=SentenceScore + score

            print("the score is: " + str(score))
            print("the count is: " + str(count))
        # average score
        avgScore = round(SentenceScore / count,5)

        print("the avg score: " + str(SentenceScore) + '/' + str(count) + '=' + str(avgScore))
        # reset counter and sentence score
        count = 0
        SentenceScore = 0

错误信息：

Traceback (most recent call last):
  File "C:/Users/User/Desktop/Complete2/Complete/TrainedTedModel/LatestJR.py", line 41, in <module>
    avgScore = round(SentenceScore / count,5)
ZeroDivisionError: division by zero
('secondly', 'pardon')
the score is: 0.180233083443
the count is: 1
('secondly', 'woods')
the score is: 0.181432347816
the count is: 2
('secondly', 'secondly')
the score is: 1
the count is: 3
the avg score: 1.36166543126/3=0.45389
('pardon', 'woods')
the score is: 0.405021005657
the count is: 1
('pardon', 'secondly')
the score is: 0.180233083443
the count is: 2
the avg score: 0.5852540891/2=0.29263
('woods', 'secondly')
the score is: 0.181432347816
the count is: 1
the avg score: 0.181432347816/1=0.18143

我已将“from __future__ import division”包含在该部门中，但似乎无法修复它

我的文件可以在以下链接中找到：

Gensim 模型：

https://entuedu-my.sharepoint.com/personal/jseng001_e_ntu_edu_sg/_layouts/15/guestaccess.aspx?guestaccesstoken=BlORQpsmI6RMIja55I%2bKO9oF456w5tBLR43XZdVCQIA%3d&docid=00459c024d33d48638508dd331cf73144&rev=1&expiration=2016-11-25T23%3a56%3a48.000Z

文本文件：

https://entuedu-my.sharepoint.com/personal/jseng001_e_ntu_edu_sg/_layouts/15/guestaccess.aspx?guestaccesstoken=7%2b8Nkm9BySPFR0zqD%2fdgUcYOaXREG3%2fycALnMFcv59A%3d&docid=08158c442c3f74970bc8090f253b499f8&rev=1&expiration=2016-11-25T23%3a56%3a01.000Z

谢谢。

Answer 1

这是因为第一个for 循环已到达最后一个单词，第二个for 循环将不会执行，因此count 等于零（在最后一次迭代中重置为零）。只需将第一个for 循环更改为忽略最后一个单词（因为没有必要）：

for each_word in words_list[:-1]:

Answer 2

出错的那一行直接在错误信息中说明：

Traceback (most recent call last):
  File "C:/Users/User/Desktop/Complete2/Complete/TrainedTedModel/LatestJR.py", line 41, in <module>
    avgScore = round(SentenceScore / count,5)
ZeroDivisionError: division by zero

所以我将假设 SentenceScore / count 是有问题的除法，所以很明显 count 是 0，我建议在该行之前添加如下内容：

print("SentenceScore is",SentenceScore, "and count is",count)

所以你可以自己看到这个，现在从内部循环开始：

对于 words_list[words_list.index(each_word) + 1:] 中的 each_word2： 计数 = 计数 + 1

是唯一增加 count 和 count 在外循环的每次迭代结束时被重置为零的东西，这意味着内循环在某些时候根本没有运行，这意味着 words_list[words_list.index(each_word) + 1:] 是一个空序列。当each_word 是words_list 中的最后一个单词时，就会发生这种情况。