I am trying to do url text summarize using nltk in python3 but i am not sure why it's showing KeyError. Here is my code:
flasexam.py
import bs4 as bs
import urllib.request
import re
import heapq
import nltk
scraped_data = urllib.request.urlopen('https://en.wikipedia.org/wiki/Machine_learning')
article = scraped_data.read()
parsed_article = bs.BeautifulSoup(article,'lxml')
paragraphs = parsed_article.find_all('p')
article_text = ""
for p in paragraphs:
article_text += p.text
article_text = re.sub(r'\[[0-9]*\]', ' ', article_text)
article_text = re.sub(r'\s+', ' ', article_text)
formatted_text = re.sub('[^a-zA-Z]', ' ', article_text)
formatted_text = re.sub(r'\s+', ' ', formatted_text)
sentence_list = nltk.sent_tokenize(article_text)
stopwords = nltk.corpus.stopwords.words('english')
word_freq = {}
for word in nltk.word_tokenize(formatted_text):
if word not in stopwords:
if word not in word_freq.keys():
word_freq[word] = 1
else:
word_freq[word] += 1
max_freq = max(word_freq.values())
for word in word_freq.keys():
word_freq[word] = (word_freq[word]/max_freq)
sentence_scores = {}
for sent in sentence_list:
for word in nltk.word_tokenize(sent.lower()):
if len(sent.split(' ')) < 30:
if sent not in sentence_scores.keys():
sentence_scores[sent] = word_freq[word]
else:
sentence_scores[sent] += word_freq[word]
summary_sentences = heapq.nlargest(7, sentence_scores, key=sentence_scores.get)
summary = ' '.join(summary_sentences)
print(summary)
while running this code it's showing this error:
Traceback (most recent call last):
File "flasexam.py", line 46, in <module>
sentence_scores[sent] = word_freq[word]
KeyError: 'it'
i am not sure what is the error exactly and how to solve this error.
Replace word_freq[word]
by:
if word in word_freq:
word_freq[word] ...
Python raises a KeyError whenever a dict() object is requested (using the format a = adict[key]) and the key is not in the dictionary .
In [8]: a = {"name":"Daka", "sex":"male"}
In [9]: a["name"]
Out[9]: 'Daka'
In [10]: a["name_bla"]
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-10-91fb451c1e47> in <module>()
----> 1 a["name_bla"]
KeyError: 'name_bla'
Simply put - you're looking for a key 'it' which is not in your dictionary.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.