CODEWITHSUNDEEP
pythonlistindexoutofboundsexception
Kristada673
Kristada673

Reputation: 3744

Why am I getting `list index out of range` error?

I wrote a code to download the synonyms of the words in a list, locations. But since a word can have multiple meanings, I used another list, meaning, to point to the serial number of the meaning I want for that word. Then calculate similarities between the words based on these synonyms found, and then save them in a file.

from nltk.corpus import wordnet as wn
from textblob import Word
from textblob.wordnet import Synset

locations = ['access', 'airport', 'amenity', 'area', 'atm', 'barrier', 'bay', 'bench', 'boundary', 'bridge', 'building', 'bus', 'cafe', 'car', 'coast', 'continue', 'created', 'defibrillator', 'drinking', 'embankment', 'entrance', 'ferry', 'foot', 'fountain', 'fuel', 'gate', 'golf', 'gps', 'grave', 'highway', 'horse', 'hospital', 'house', 'land', 'layer', 'leisure', 'man', 'market', 'marketplace', 'height', 'name', 'natural', 'exit', 'way', 'park', 'parking', 'place', 'worship', 'playground', 'police', 'station', 'post', 'mail', 'power', 'private', 'public', 'railway', 'ref', 'residential', 'restaurant', 'road', 'route', 'school', 'shelter', 'shop', 'source', 'sport', 'toilet', 'tourism', 'unknown', 'vehicle', 'vending', 'machine', 'village', 'wall', 'waste', 'waterway'];

meaning = [0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 5, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 11, 0, 1, 0, 0, 3, 0, 4, 0, 0, 3, 4, 0, 0, 0, 10, 0, 9, 1, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0]

ncols = len(locations)
nrows = len(locations)
matrix = [[0] * ncols for i in range(nrows)]

for i in range(0,len(locations)):
    word1 = Word(locations[i])
    SS1 = word1.synsets[meaning[i]]
    for j in range(0,len(locations)):
        word2 = Word(locations[j])
        SS2 = word1.synsets[meaning[j]]
        matrix[i][j] = SS1.path_similarity(SS2)

f = open('Similarities.csv', 'w')
print(matrix, file=f)

But the code gives the following error:

SS2 = word1.synsets[meaning[j]]
IndexError: list index out of range

When I printed out the values of i and j, I found that it prints till i=0 and j=36. That means that when j=36, the error arises. The word in the list at index 36 is man, and the value at index 36 of meaning is 11.

enter image description here

So, why is this error occuring and how do I fix it?

EDIT: The mistake was in SS2 = word1.synsets[meaning[j]]. It should have been SS2 = word2.synsets[meaning[j]]. Sorry.

Upvotes: 0

Views: 684

Answers (1)

elusivenode
elusivenode

Reputation: 39

len(word1.synsets) returns 8 and type(word1.synsets) returns list. So it's a list with indexes 0 to 7.

your list 'meaning' contains 11 at index 36. so when your loop reaches word1.synsets[11] you get the index out of range error.

Like Jose said, 7 is the max int you can have in 'meaning'.

Upvotes: 2

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