old_contents: import pandas as pd
  
  
  def _params_dict_to_dataframe(d):
      s = pd.Series(d)
      s.index.name = 'parameters'
      f = pd.DataFrame({'values': s})
      return f
  
  
  def write_excel(filename, **kwargs):
      """Write data tables to an Excel file, using kwarg names as sheet names.
      
      Parameters
      ----------
      filename : str
          The filename to write to.
      kwargs : dict
          Mapping from sheet names to data.
      """
      writer = pd.ExcelWriter(filename)
      for sheet_name, obj in kwargs.items():
          if isinstance(obj, dict):
              obj = _params_dict_to_dataframe(obj)
          if isinstance(obj, pd.DataFrame):
              obj.to_excel(writer, sheet_name=sheet_name)
      writer.save()
      writer.close()
  
new_contents: import pandas as pd
  
  
  def _params_dict_to_dataframe(d):
      s = pd.Series(d)
      s.index.name = 'parameters'
      f = pd.DataFrame({'values': s})
      return f
  
  
  def write_excel(filename, **kwargs):
      """Write data tables to an Excel file, using kwarg names as sheet names.
      
      Parameters
      ----------
      filename : str
          The filename to write to.
      kwargs : dict
          Mapping from sheet names to data.
      """
      writer = pd.ExcelWriter(filename)
      for sheet_name, obj in kwargs.items():
          if isinstance(obj, dict):
              obj = _params_dict_to_dataframe(obj)
          if isinstance(obj, pd.DataFrame):
              obj.to_excel(writer, sheetname=sheet_name)
      writer.save()
      writer.close()
  
subject: Update deprecated excel kwarg in pandas