'set' object cannot be interpreted as an integer - python-3.x

Question

I have the following python code:
text = "this’s a sent tokenize test. this is sent two. is this sent three? sent 4 is cool! Now it’s your turn."
from nltk.tokenize import sent_tokenize
sent_tokenize_list = sent_tokenize(text)
import numpy as np
lenDoc=len(sent_tokenize_list)
features={'position','rate'}
score = np.empty((lenDoc, 2), dtype=object)
score=[[0 for x in range(sent_tokenize_list)] for y in range(features)]
for i,sentence in enumerate(sent_tokenize_list):
score[i,features].append((lenDoc-i)/lenDoc)
But it results in the following error:
TypeError Traceback (most recent call last) <ipython-input-27-c53da2b2ab02> in <module>()
13
14
---> 15 score=[[0 for x in range(sent_tokenize_list)] for y in range(features)]
16 for i,sentence in enumerate(sent_tokenize_list):
17 score[i,features].append((lenDoc-i)/lenDoc)
TypeError: 'set' object cannot be interpreted as an integer

Answer 1

range() takes int values. features is a set so it throws an error. you made the same mistake with range(sent_tokenize_list). sent_tokenize_list is a list value not an int.
If you want x and y to be indexes of features and sent_tokenize_list then you have to use this: score=[[0 for x in range(len(sent_tokenize_list))] for y in range(len(features))]
But if you want x and y to be values of features and sent_tokenize_list then you have to remove range() from that line.