new_contents: #!/usr/bin/env python3
  from kapi import *
  import utils
  import argparse, sys
  import time
  import json
  
  def read_cmd():
     """Reading command line options."""
     desc = "Program for finding KA content without descriptions."
     parser = argparse.ArgumentParser(description=desc)
     parser.add_argument('-s','--subject', dest='subject', default = 'root', help = 'Link given course.')
     parser.add_argument('-c','--content', dest='content', required = True, help = 'Content kind: video|exercise')
     return parser.parse_args()
  
  # Currently, article type does not seem to work.
  CONTENT_TYPES = ['video', 'exercise']
  
  
  def print_slugs_without_descriptions(content):
      unique_content_ids = set()
  
      for c in content:
  
          if c['id'] in unique_content_ids:
              continue
          else:
              unique_content_ids.add(c['id'])
  
          if c['translated_description'] is None:
              #print(c['node_slug'], 'WARNING: Empty description, returning None')
              print(c['node_slug'])
          elif not c['translated_description']:
              #print(c['node_slug'], 'WARNING: Empty description!')
              print(c['node_slug'])
  
  
  if __name__ == '__main__':
  
      opts = read_cmd()
      topic = opts.subject
      content_type = opts.content.lower()
  
      if content_type not in CONTENT_TYPES:
          print("ERROR: content argument: ", opts.content)
          print("Possibilities are: ", CONTENT_TYPES)
          exit(1)
  
      khan_tree = KhanContentTree('en', content_type)
      tree = khan_tree.get()
      if topic != 'root':
          subtree = find_ka_topic(tree, topic)
      else:
          subtree = tree
      if not subtree:
          print("ERROR: Could not find subtree for topic: %s\n" % (topic))
          sys.exit(1)
  
      content = []
      kapi_tree_get_content_items(subtree, content, content_type)
      print_slugs_without_descriptions(content)
  
  
  
subject: Add script for finding missing descriptions in KA content