Script to extract keywords from the comments on Airbnb reviews file using NLTK module of Python

• As the csv file contains more than 600,000 records and I am writing the keywords into csv file, this script takes a long time to run.
• So, here I have run the script on a subset of the original file.
• Link to original csv file can be found in the text file.
• Have removed any non english word from the comments

• Can make more use of NLTK Wordnet to discover word collocations
• Spelling correction with Enchant
• Replace negation with antonyms
• After extracting relevant keywords from reviews, sentiment analyasis can be easily carried after creating bag of words, features and featureset with relevant words
• Result of Naive Bayes, scikit learn and other classifiers can be combined with voting to give higher accuracy, AUROC and other estimators of the model