just started this and have quite a bit trouble getting used to python despite having read all the courseware. My code keeps returning a neutral face. What is wrong? Thanks.
import nltk
class Analyzer():
"""Implements sentiment analysis."""
def __init__(self, positives, negatives):
"""Initialize Analyzer."""
#instantiate analyzer
#create two sets to hold the words
self.positives = set()
self.negatives = set()
#open each file
#read each file line by line, removing extra space and comments
#for positives
with open(positives) as pfile:
for line in pfile:
if not line.startswith(";"):
line = line.strip()
self.positives.add(line)
#for negatives
with open(negatives) as nfile:
for line in nfile:
if not line.startswith(";"):
line = line.strip()
self.negatives.add(line)
def analyze(self, text):
"""Analyze text for sentiment, returning its score."""
#initialise score as 0
score = 0
#tokenize the text with help from nltk
tokenizer = nltk.tokenize.TweetTokenizer()
tokens = tokenizer.tokenize(text)
#make all the words in token lower case
for i in range(len(tokens)):
if tokens[i].lower in self.positives:
score += 1
for i in range(len(tokens)):
if tokens[i].lower in self.negatives:
score -= 1
return score
