code: def get_dbs():
      
      url = posixpath.join(config.db_index_url, 'DBS')
      response = requests.get(url)
  
      dbs = response.content.decode('ascii').splitlines()
      dbs = [re.sub('\t{2,}', '\t', line).split('\t') for line in dbs]
  
      return dbs
docs: Get a list of all the Physiobank databases available.
  
      Examples
      --------
      >>> dbs = get_dbs()