Tuples going empty

Question

I am new to python trying to work with NLTK.

I am trying to figure out why the tuple of the words is going empty for the following piece of code.

import nltk
import random
from nltk.corpus import movie_reviews

#Empty feature tuple
tupleDocuments = []

#Empty list of words
listWords = []

#For every words in the files, categorizing the list of words in one category
for category in movie_reviews.categories():
    for fileid in movie_reviews.fileids(category):
        #Running for all words in one file
        for word in movie_reviews.words(fileid):
            #Convert all the words to lower case
            word = word.lower()
            #Appending all the words in the file to a list
            listWords.append(word)
            #print the list of words
            #print(listWords)
        #Adding the list and the category as tuple into feature    
        tupleDocuments.append([listWords,category])
        #Print Tuple Document
        #print(tupleDocuments)
        #Clearing the list
        listWords.clear()

#randomizing all the sets
random.shuffle(tupleDocuments)

#Printing the 2nd tuple of features
print(tupleDocuments[2])

Tuples are immutable and cannot "go empty". Which variable are you actually referring to? — Aran-Fey, Jan 17 '18 at 08:02
Are you sure you are using tuple? Isn't it list tupleDocuments = [] — Hariom Singh, Jan 17 '18 at 08:03
I am actually appending to the empty tuple tupleDocuments.append([listWords, category]) — Avirup Das, Jan 17 '18 at 08:05
Change `tupleDocuments.append([listWords,category])` to `tupleDocuments.append([listWords.copy(),category])`. Alternatively, you can change `listWords.clear()` to `listWords = []`. — Aran-Fey, Jan 17 '18 at 08:06
@AvirupDas `[]` denotes a list - see: https://docs.python.org/3/tutorial/datastructures.html#tuples-and-sequences — user4020527, Jan 17 '18 at 08:08

Tuples going empty

0 Answers0