code: def load_excel(self, filepath, **kwargs):
          
          try:
              df = pd.read_excel(filepath, **kwargs)
              if len(df.index) == 0:
                  self.warning("Empty Excel file. Can not set the dataframe.")
                  return
              self.df = df
          except Exception as e:
              self.err(e, "Can not load Excel file")
docs: Set the main dataframe with the content of an Excel file
  
          :param filepath: url of the csv file to load,
                          can be absolute if it starts with ``/``
                          or relative if it starts with ``./``
          :type filepath: str
  
          :param kwargs: keyword arguments to pass to 
                              Pandas ``read_excel`` function
  
          :example: ``ds.load_excel("./myfile.xlsx")``