python3 venv 环境下读取 xlsx文件 报错解决

Python 3.6.8 (default, Nov 21 2019, 19:31:34) 
[GCC 8.3.1 20190507 (Red Hat 8.3.1-4)] on linux
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>>> import pandas as pd
>>> pd.read_excel("./list.xlsx")
Traceback (most recent call last):
  File "", line 1, in
  File "/home/clusteruser/env3/lib64/python3.6/site-packages/pandas/io/excel/_base.py", line 304, in read_excel
    io = ExcelFile(io, engine=engine)
  File "/home/clusteruser/env3/lib64/python3.6/site-packages/pandas/io/excel/_base.py", line 821, in __init__
    self._reader = self._engines[engine](self._io)
  File "/home/clusteruser/env3/lib64/python3.6/site-packages/pandas/io/excel/_xlrd.py", line 21, in __init__
    super().__init__(filepath_or_buffer)
  File "/home/clusteruser/env3/lib64/python3.6/site-packages/pandas/io/excel/_base.py", line 353, in __init__
    self.book = self.load_workbook(filepath_or_buffer)
  File "/home/clusteruser/env3/lib64/python3.6/site-packages/pandas/io/excel/_xlrd.py", line 36, in load_workbook
    return open_workbook(filepath_or_buffer)
  File "/home/clusteruser/env3/lib64/python3.6/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
>>> pd.read_excel("./list.xlsx",engine="openpyxl")

指定engine后，可正常读取