使用labelImg [IMAGE_PATH] [PRE-DEFINED CLASS FILE]报错ImportError: DLL load failed while importing etree

用labelImg标注数据集时，使用labelImg [IMAGE_PATH] [PRE-DEFINED CLASS FILE]命令，出现了以下错误：

Traceback (most recent call last): File "d:\anaconda3\lib\runpy.py", line 194, in _run_module_as_main return _run_code(code, main_globals, None, File "d:\anaconda3\lib\runpy.py", line 87, in _run_code exec(code, run_globals) File "D:\Anaconda3\Scripts\labelImg.exe\__main__.py", line 4, in <module> File "d:\anaconda3\lib\site-packages\labelImg\labelImg.py", line 43, in <module> from libs.labelFile import LabelFile, LabelFileError, LabelFileFormat File "d:\anaconda3\lib\site-packages\libs\labelFile.py", line 10, in <module> from libs.pascal_voc_io import PascalVocWriter File "d:\anaconda3\lib\site-packages\libs\pascal_voc_io.py", line 6, in <module> from lxml import etree ImportError: DLL load failed while importing etree: 找不到指定的模块。

这个应该是lxml有问题，网上找了很多方法都没解决，最后看了一下requirements文件，考虑可能是lxml版本太低了，要求版本是4.9.1，我是是4.6.4，执行命令：

pip install lxml==4.9.1

再使用labelImg [IMAGE_PATH] [PRE-DEFINED CLASS FILE]就不会有报错了。