如何在python中使用RAKE提取關鍵字

Question

我已經實現了這段代碼，但是它在屏幕上什么都不打印。

from rake_nltk import Rake

r = Rake() # Uses stopwords for english from NLTK, and all puntuation characters.

#r = Rake(english) # To use it in a specific language supported by nltk.

# If you want to provide your own set of stop words and punctuations to
# r = Rake(<list of stopwords>, <string of puntuations to ignore>)

print(r.extract_keywords_from_text('hello world'))

r.get_ranked_phrases() # To get keyword phrases ranked highest to lowest.

Answer 1

語句：print（r.extract_keywords_from_text（'hello world'））將僅打印關鍵字，因此將打印出None。您需要打印第二行代碼，如下所示：print（r.get_ranked_phrases（））。以下內容可能會有所幫助：

from rake_nltk import Rake
from nltk.corpus import stopwords 
r = Rake() # Uses stopwords for english from NLTK, and all puntuation characters.Please note that "hello" is not included in the list of stopwords.

text='Hello World'
a=r.extract_keywords_from_text(text)
b=r.get_ranked_phrases()
c=r.get_ranked_phrases_with_scores()
print(b)
print(c)

output:['hello world']
[(4.0, 'hello world')]

我建議也使用包含多個字符串的文本進行嘗試。有關更多詳細信息，請參閱https://pypi.python.org/pypi/rake-nltk 。