text: import click
  
  def read_ava_data(data_folder):
      import pandas as pd
      import os
  
      columns = 'Index ImageId r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 SemanticTag1 SemanticTag2 ChallengeId'.split()
      df = pd.read_csv(os.path.join(data_folder, 'AVA.txt'), delimiter=' ', names=columns)
      return df
  
  
  def to_url(img_id):
      return 'http://www.dpchallenge.com/image.php?IMAGE_ID={img_id}'.format(img_id=img_id)
  
  
  @click.command()
  @click.option('--data-folder', '-d', default='./data', help='AVA Data Folder (default: ./data)')
  def stats(data_folder):
      df = read_ava_data(data_folder)
      print(df.head())
      print(df.info())
      print(df.describe())
  
  
  @click.command()
  @click.option('--data-folder', '-d', default='./data', help='AVA Data Folder (default: ./data)')
  def download_ava(data_folder):
      df = read_ava_data(data_folder)
      urls = map(to_url, df['ImageId'].values)
      for i, url in enumerate(urls):
          print(url)
          if i == 10:
              break
  
  
  
  @click.group()
  def main():
      return 0
  
  main.add_command(download_ava, 'ava')
  main.add_command(stats)
  
  