PorterStemmer：在 Spyder 上运行时没有词干输出或错误

Question

As evident in my Spyder's screen-shot 和下面的代码，我没有得到任何输出或任何错误。我错过了什么？：

import nltk
from nltk.stem import PorterStemmer

paragraph = "The Times of India issued its first edition on 3 November 
             1838 as The Bombay Times and Journal of Commerce.[13][14] 
             The paper published Wednesdays and Saturdays under the 
             direction of Raobahadur Narayan Dinanath Velkar, a 
             Maharashtrian Reformist, and contained news from Britain and the world, as well as the Indian Subcontinent. J.E. Brennan was its first editor.[15][16] In 1850, it began to publish 
             daily editions."

sentences = nltk.sent_tokenize(paragraph)
stemmer = PorterStemmer()

for i in range(len(sentences)):
    words = nltk.word_tokenize(sentences[i])
    newwords = [stemmer.stem(word) for word in words]
    sentences[i] = ' '.join(newwords)    

Answer 1

感谢@prashant rana，我的按钮是点击帮助而不是变量资源管理器