Pandas读取Excel文件XLRDError: Excel xlsx file； not supported

问题背景：

        工作中大部使用Pandas分处理的数据都是以csv后缀结尾的文件，但是突然换成xlsx后缀的表格之后，出现的一些错误。

问题现象：

        XLRDError: Excel xlsx file; not supported

/usr/local/lib/python3.6/site-packages/xlrd/__init__.py in open_workbook(filename, logfile, verbosity, use_mmap, file_contents, encoding_override, formatting_info, on_demand, ragged_rows, ignore_workbook_corruption)
    168     # files that xlrd can parse don't start with the expected signature.
    169     if file_format and file_format != 'xls':
--> 170         raise XLRDError(FILE_FORMAT_DESCRIPTIONS[file_format]+'; not supported')
    171 
    172     bk = open_workbook_xls(

XLRDError: Excel xlsx file; not supported

import pandas as pd
PATH = '/tmp/MSD0921.xlsx'
dataframe = pd.read_excel(PATH, engine=None)

查看源码：

        在pandas的base.py文件的ExcelFile类下边有这么一段描述，大概在1117-1127行。

engine : str, default None
    If io is not a buffer or path, this must be set to identify io.
    Supported engines: ``xlrd``, ``openpyxl``, ``odf``, ``pyxlsb``
    Engine compatibility :

    - ``xlrd`` supports old-style Excel files (.xls).
    - ``openpyxl`` supports newer Excel file formats.
    - ``odf`` supports OpenDocument file formats (.odf, .ods, .odt).
    - ``pyxlsb`` supports Binary Excel files.

    .. versionchanged:: 1.2.0

       The engine `xlrd `_
       now only supports old-style ``.xls`` files.
       When ``engine=None``, the following logic will be
       used to determine the engine:

源码解读：

        大概的意思是，pandas 读取excel表格只支持这四种引擎，xlrd，openpyxl，odf，pyxlsb如果不是这四种就会抛出异常。如果engine=None的话，默认的就是xlrd引擎，只支持老式的Excel文件，.xls后缀的

代码修改：

只需要将引擎换成 openpyxl即可

import pandas as pd
PATH = '/tmp/MSD0921.xlsx'
dataframe = pd.read_excel(PATH,engine='openpyxl')

 总结：关于第三方库代码的问题，要学去看源码，分析问题所在，大部分问题都能够解决