old_contents: from flask import Blueprint, request, render_template
  from ..load import processing_results, api
  import string
  import tweepy
  
  
  twitter_mod = Blueprint('twitter', __name__, template_folder='templates', static_folder='static')
  
  ascii_chars = set(string.printable)
  ascii_chars.remove(' ')
  ascii_chars.add('...')
  
  
  def takeout_non_ascii(s):
      return list(filter(lambda x: x not in ascii_chars, s))
  
  
  @twitter_mod.route('/twitter', methods=['GET', 'POST'])
  def twitter():
      if request.method == 'POST':
  
          text = []
          for tweet in tweepy.Cursor(api.search, request.form['topic'], lang='hi').items(50):
              temp = ''.join(takeout_non_ascii(tweet.text))
              if not len(temp) in range(3):
                  text.append(temp)
  
          data, emotion_sents, score, line_sentiment, text, length = processing_results(text)
  
          return render_template('projects/twitter.html', data=[data, emotion_sents, score, zip(text, line_sentiment), length])
      else:
          return render_template('projects/twitter.html')
  
  
new_contents: from flask import Blueprint, request, render_template
  from ..load import processing_results, api
  import string
  import tweepy
  
  twitter_mod = Blueprint('twitter', __name__, template_folder='templates', static_folder='static')
  
  ascii_chars = set(string.printable)
  ascii_chars.remove(' ')
  ascii_chars.add('...')
  
  def takeout_non_ascii(s):
      return list(filter(lambda x: x not in ascii_chars, s))
  
  @twitter_mod.route('/twitter', methods=['GET', 'POST'])
  def twitter():
      if request.method == 'POST':
          try:
              topic = request.form['topic'].strip()
              if topic == '':
                  return render_template('projects/twitter.html', message='Please enter a valid topic')
              text = []
              for tweet in tweepy.Cursor(api.search, topic, lang='hi').items(50):
                  temp = ''.join(takeout_non_ascii(tweet.text))
                  if not len(temp) in range(3):
                      text.append(temp)
              data, emotion_sents, score, line_sentiment, text, length = processing_results(text)
              return render_template('projects/twitter.html', data=[data, emotion_sents, score, zip(text, line_sentiment), length])
  
          except Exception:
                  return render_template('projects/twitter.html', message='Something went wrong. Please try again.')
      else:
          return render_template('projects/twitter.html')
  
  
subject: Add exception handling in twitter view