max_freq = maxword_freq.valuesValueError：maxarg是空序列吗？

问题描述

我尝试总结文本正文，控制台向我显示max（）arg是一个空序列，用于计算每个令牌中的最大频率单词，我的数据为20000，代码在前7000行上工作正常

for i in range(0,len(data)):
  doc = nlp(data.text[i])
  tokens = [token.text for token in doc]
  
  
  word_freq = {}
  stop_words= list(STOP_WORDS)
  for word in doc:
     if word.text.lower() not in stop_words:
       if word.text.lower() not in punctuation:
         if word.text not in word_freq.keys():
          word_freq[word.text] = 1
         else :
          word_freq[word.text] += 1
  #the ERROR
  max_freq =max(word_freq.values())
    
  for word in word_freq.keys():
      word_freq[word] = word_freq[word] / max_freq
  
  sent_tokens = [sent for sent in doc.sents]
  
  sent_score={}
  for sent in sent_tokens:
      for word in sent: 
        if word.text.lower() in word_freq.keys():
           if sent not in sent_score.keys():   
             sent_score[sent] = word_freq[word.text.lower()]
           else :
            sent_score[sent] += word_freq[word.text.lower()]
  
  from heapq import nlargest
  
  N=int(len(sent_score)* 0.1)
  summary = nlargest(n = N,iterable = sent_score,key = sent_score.get)
  
  final_summary = [word.text for word in summary]

解决方法

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nlp python summarization