code: def h_v_td(header, key, default):
          
          if key not in header:
              key = key.title()
  
          return header.get(key, default)
docs: get header value with title with default value
          try to get key from header and consider case sensitive
          e.g. header['x-log-abc'] or header['X-Log-Abc']
          :param header:
          :param key:
          :param default:
          :return: