export.py 文件源码

def write_data(self, file_descr):
        """
        Use dataframe to_excel to write into file_descr (filename) - open first if file exists.
        """
        if os.path.isfile(file_descr):
            print(file_descr, 'exists')
            # Solution to keep existing data
            book = load_workbook(file_descr)
            writer = pd.ExcelWriter(file_descr, engine='openpyxl')
            writer.book = book
            writer.sheets = dict((ws.title, ws) for ws in book.worksheets)
            self.data_df.to_excel(writer, sheet_name='Mongo_Schema', index=True,
                                  float_format='%.2f')
            writer.save()
        else:
            self.data_df.to_excel(file_descr, sheet_name='Mongo_Schema', index=True,
                                  float_format='%.2f')