for loop for nltk stopwords goes to infinity

Question

import nltk as nt

txt="The latest version of Anaconda comes with Python 3.8. But sometimes you need to use an earlier release. With Anaconda, the preferred way to use a previous version of Python is to create a separate conda environment for each project."

word_tok=nt.word_tokenize(txt)
stopWords=nt.corpus.stopwords.words("english")
print(word_tok)

wordClear=[]
for i in word_tok: # infinity loop
      if i not in stopWords:
        word_tok.append(i)

what is the problem?

I see always up stated form but my project's this form is infinity loop but

for i in word_tok:
  print(i)

This for did'nt infinity loop.

Answer 1

import nltk as nt

txt="The latest version of Anaconda comes with Python 3.8. But sometimes you need to use an earlier release. With Anaconda, the preferred way to use a previous version of Python is to create a separate conda environment for each project."

word_tok=nt.word_tokenize(txt)
stopWords=nt.corpus.stopwords.words("english")
print(word_tok)

wordClear=[]
for i in word_tok: # infinity loop
      if i not in stopWords:
        # Do you wantthis?
        wordClear.append(i)

You are updating the array word_tok and dynamically add new i's. So it might keep on increasing and never end.