遇到的那些报错

workbook = load_workbook('test.xlsx')

Traceback (most recent call last):
  File "C:\Python 3.6.5\lib\site-packages\openpyxl\reader\excel.py", line 121, in _validate_archive
    archive = ZipFile(filename, 'r', ZIP_DEFLATED)
  File "C:\Python 3.6.5\lib\zipfile.py", line 1108, in __init__
    self._RealGetContents()
  File "C:\Python 3.6.5\lib\zipfile.py", line 1175, in _RealGetContents
    raise BadZipFile("File is not a zip file")
zipfile.BadZipFile: File is not a zip file