code: def extract_snow_tweets_from_file_generator(json_file_path):
      
      with open(json_file_path, "r", encoding="utf-8") as fp:
          for file_line in fp:
              tweet = json.loads(file_line)
              yield tweet
docs: A generator that opens a file containing many json tweets and yields all the tweets contained inside.
  
      Input:  - json_file_path: The path of a json file containing a tweet in each line.
  
      Yields: - tweet: A tweet in python dictionary (json) format.