docs: def downzip(url, destination='./sample_data/'):
      """
      Download, unzip and delete.
      """
  
      # url = "http://147.228.240.61/queetech/sample-data/jatra_06mm_jenjatra.zip"
      logmsg = "downloading from '" + url + "'"
      print(logmsg)
      logger.debug(logmsg)
      local_file_name = os.path.join(destination, 'tmp.zip')
      urllibr.urlretrieve(url, local_file_name)
      datafile = zipfile.ZipFile(local_file_name)
      datafile.extractall(destination)
      remove(local_file_name)