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# This Python 3 environment comes with many helpful analytics libraries installed
# It is defined by the kaggle/python Docker image: https://github.com/kaggle/docker-python
# For example, here's several helpful packages to load

import numpy as np # linear algebra
import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

# Input data files are available in the read-only "../input/" directory
# For example, running this (by clicking run or pressing Shift+Enter) will list all files under the input directory

import os
for dirname, _, filenames in os.walk('/kaggle/input'):
    for filename in filenames:
        print(os.path.join(dirname, filename))

# You can write up to 5GB to the current directory (/kaggle/working/) that gets preserved as output when you create a version using "Save & Run All" 
# You can also write temporary files to /kaggle/temp/, but they won't be saved outside of the current session

Text Precprocessing Steps:

Inspired from another notebook

Only few of these are required in this context for topic modelling

  • Lower casing
  • Removal of Punctuations
  • Removal od stop words
  • Removal of frequent words (taken care of by NMF)
  • Removal of Rare words (taken care of by NMF)
  • Stemming/ Lemmatization
  • Removal of emojis
  • Removal of emoticons
  • Conversion of emoticons to words
  • Removal of URLs
  • Removal of HTML tags
  • Chat words conversion
  • Spelling correction
import pandas as pd
raw_data = pd.read_csv("../input/customer-support-on-twitter/twcs/twcs.csv")
sample_data = pd.read_csv("../input/customer-support-on-twitter/sample.csv")