title: Attribute error when using user object on tweepy
body: <p>I'm trying to write a program that will stream tweets from Twitter using their Stream API and Tweepy. Here's the relevant part of my code:</p>
  
  <pre><code>def on_data(self, data):
      if data.user.id == "25073877" or data.in_reply_to_user_id == "25073877":
          self.filename = trump.csv
  
      elif data.user.id == "30354991" or data.in_reply_to_user_id == "30354991":
          self.filename = harris.csv
  
      if not 'RT @' in data.text:
          csvFile = open(self.filename, 'a')
          csvWriter = csv.write(csvFile)
  
          print(data.text)
          try:
              csvWriter.writerow([data.text, data.created_at, data.user.id, data.user.screen_name,  data.in_reply_to_status_id])
  
          except:
              pass
  
  def on_error(self, status_code):
      if status_code == 420:
          return False
  </code></pre>
  
  <p>What the code should be doing is streaming the tweets and writing the text of the tweet, the creation date, the user ID of the tweeter, their screen name, and the reply ID of the status they're replying to if the tweet is a reply. However, I get the following error: </p>
  
  <pre><code>File "test.py", line 13, in on_data
  
   if data.user.id == "25073877" or data.in_reply_to_user_id == "25073877":
  
  AttributeError: 'unicode' object has no attribute 'user'
  </code></pre>
  
  <p>Could someone help me out? Thanks!</p>
  
  <p>EDIT: Sample of what is being read into "data"</p>
  
  <pre><code>{"created_at":"Fri Feb 15 20:50:46 +0000 2019","id":1096512164347760651,"id_str":"1096512164347760651","text":"@realDonaldTrump \nhttps:\/\/t.co\/NPwSuJ6V2M","source":"\u003ca href=\"http:\/\/twitter.com\" rel=\"nofollow\"\u003eTwitter Web Client\u003c\/a\u003e","truncated":false,"in_reply_to_status_id":null,"in_reply_to_status_id_str":null,"in_reply_to_user_id":25073877,"in_reply_to_user_id_str":"25073877","in_reply_to_screen_name":"realDonaldTrump","user":{"id":1050189031743598592,"id_str":"1050189031743598592","name":"Lauren","screen_name":"switcherooskido","location":"United States","url":null,"description":"Concerned citizen of the USA who would like to see Integrity restored in the US Government. Anti-marxist!\nSigma, INTP\/J\nREJECT PC and Identity Politics #WWG1WGA","translator_type":"none","protected":false,"verified":false,"followers_count":1459,"friends_count":1906,"listed_count":0,"favourites_count":5311,"statuses_count":8946,"created_at":"Thu Oct 11 00:59:11 +0000 2018","utc_offset":null,"time_zone":null,"geo_enabled":false,"lang":"en","contributors_enabled":false,"is_translator":false,"profile_background_color":"000000","profile_background_image_url":"http:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png","profile_background_image_url_https":"https:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png","profile_background_tile":false,"profile_link_color":"FF691F","profile_sidebar_border_color":"000000","profile_sidebar_fill_color":"000000","profile_text_color":"000000","profile_use_background_image":false,"profile_image_url":"http:\/\/pbs.twimg.com\/profile_images\/1068591478329495558\/ng_tNAXx_normal.jpg","profile_image_url_https":"https:\/\/pbs.twimg.com\/profile_images\/1068591478329495558\/ng_tNAXx_normal.jpg","profile_banner_url":"https:\/\/pbs.twimg.com\/profile_banners\/1050189031743598592\/1541441602","default_profile":false,"default_profile_image":false,"following":null,"follow_request_sent":null,"notifications":null},"geo":null,"coordinates":null,"place":null,"contributors":null,"is_quote_status":false,"quote_count":0,"reply_count":0,"retweet_count":0,"favorite_count":0,"entities":{"hashtags":[],"urls":[{"url":"https:\/\/t.co\/NPwSuJ6V2M","expanded_url":"https:\/\/www.conservativereview.com\/news\/5-insane-provisions-amnesty-omnibus-bill\/","display_url":"conservativereview.com\/news\/5-insane-\u2026","indices":[18,41]}],"user_mentions":[{"screen_name":"realDonaldTrump","name":"Donald J. Trump","id":25073877,"id_str":"25073877","indices":[0,16]}],"symbols":[]},"favorited":false,"retweeted":false,"possibly_sensitive":false,"filter_level":"low","lang":"und","timestamp_ms":"1550263846848"}
  </code></pre>
  
  <p>So I supposed the revised question is how to tell the program to only write parts of this JSON output to the CSV file? I've been using the references Twitter's stream API provides for the attributes for "data".</p>