使用openpyxl保存文件的时候，出现最下面异常，查看openpyxl 的版本是2.5.14， 把openpyxl降级就可以解决此问题。
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[root@billig mytest]# pip install openpyxl==2.5.11
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Looking in indexes: http://mirrors.aliyun.com/pypi/simple/
Collecting openpyxl==2.5.11
Downloading http://mirrors.aliyun.com/pypi/packages/38/7f/65d6b1700470749579b1585bbaf85fb8885f10fd53a77fb11915df913bbc/openpyxl-2.5.11.tar.gz (173kB)
100% |################################| 174kB 596kB/s
Requirement already satisfied: jdcal in /usr/lib/python2.7/site-packages (from openpyxl==2.5.11) (1.4)
Requirement already satisfied: et_xmlfile in /usr/lib/python2.7/site-packages (from openpyxl==2.5.11) (1.0.1)
Installing collected packages: openpyxl
Found existing installation: openpyxl 2.5.14
Uninstalling openpyxl-2.5.14:
Successfully uninstalled openpyxl-2.5.14
Running setup.py install for openpyxl ... done
Successfully installed openpyxl-2.5.11
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raceback (most recent call last):
File "excelwritedemonopd.py", line 24, in <module>
work_book.save("demo_new.xlsx")
File "/usr/lib/python2.7/site-packages/openpyxl/workbook/workbook.py", line 391, in save
save_workbook(self, filename)
File "/usr/lib/python2.7/site-packages/openpyxl/writer/excel.py", line 284, in save_workbook
writer.save(filename)
File "/usr/lib/python2.7/site-packages/openpyxl/writer/excel.py", line 266, in save
self.write_data()
File "/usr/lib/python2.7/site-packages/openpyxl/writer/excel.py", line 85, in write_data
self._write_images()
File "/usr/lib/python2.7/site-packages/openpyxl/writer/excel.py", line 122, in _write_images
self._archive.writestr(img.path[1:], img._data())
File "/usr/lib/python2.7/site-packages/openpyxl/drawing/image.py", line 64, in _data
img = _import_image(self.ref)
File "/usr/lib/python2.7/site-packages/openpyxl/drawing/image.py", line 33, in _import_image
img = PILImage.open(img)
File "/usr/lib64/python2.7/site-packages/PIL/Image.py", line 2638, in open
fp.seek(0)
ValueError: I/O operation on closed file.
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补充：python的openpyxl 3.0.2版无法保存数据
在使用openpyxl3.0.2版的时候老是
报错“TypeError: got invalid input value of type , expected string or Element”
在将3.0.2版的卸载并且重新安装了3.0.0版的openpyxl之后此报错解除！
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。如有错误或未考虑完全的地方，望不吝赐教。
原文链接：https://blog.csdn.net/powerccna/article/details/103813380