import xlrd
# import openpyxl

data = xlrd.open_workbook("data1.xlsx")
print(data.sheet_loaded(0))

"E:\Embedded programming\Python\20210201Monday\venv\Scripts\python.exe" "E:/Embedded programming/Python/20210201Monday/hello.py"

Traceback (most recent call last):

  File "E:/Embedded programming/Python/20210201Monday/hello.py", line 4, in <module>

    data = xlrd.open_workbook("data1.xlsx")

  File "E:\Embedded programming\Python\20210201Monday\venv\lib\site-packages\xlrd\__init__.py", line 170, in open_workbook

    raise XLRDError(FILE_FORMAT_DESCRIPTIONS[file_format]+'; not supported')

xlrd.biffh.XLRDError: Excel xlsx file; not supported