pandas 写Excel 时报错：ValueError: Writing 0 cols but got 8 aliases

pandas 写Excel 时报错：

Traceback (most recent call last):
  File "D:\code_tool\spiderYesmro3\main.py", line 244, in <module>
    main()
  File "D:\code_tool\spiderYesmro3\main.py", line 33, in main
    df.to_excel(writer, sheet_name=cate, header=excel_title, index=False)
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\util\_decorators.py", line 211, in wrapper
    return func(*args, **kwargs)
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\util\_decorators.py", line 211, in wrapper
    return func(*args, **kwargs)
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\core\generic.py", line 2374, in to_excel
    formatter.write(
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\io\formats\excel.py", line 950, in write
    writer._write_cells(
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\io\excel\_openpyxl.py", line 492, in _write_cells
    for cell in cells:
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\io\formats\excel.py", line 887, in get_formatted_cells
    for cell in itertools.chain(self._format_header(), self._format_body()):
  File "D:\code_tool\spiderYesmro3\venv\lib\site-packages\pandas\io\formats\excel.py", line 691, in _format_header_regular
    raise ValueError(
ValueError: Writing 0 cols but got 8 aliases

复现：

总结：

原因：DataFrame 中的数据源为空导致