【BUG】No module named ‘dnf‘

报错内容：

• 类型一

# git clone https://github.com/pytorch/vision.git
Cloning into 'vision'...
/usr/libexec/git-core/git-remote-https: symbol lookup error: /usr/lib64/libldap.so.2: undefined symbol: EVP_md2, version OPENSSL_1_1_0

• 类型二

# yum reinstall openssl
Traceback (most recent call last):
  File "/usr/bin/yum", line 57, in <module>
    from dnf.cli import main
ModuleNotFoundError: No module named 'dnf'

报错原因：

• python环境变量设置了绝对路径，删除虚拟环境后找不到python了
• /etc/profile配置文件或~/.bashrc配置文件被改写

解决方案

临时解决

unset LD_LIBRARY_PATH

永久解决

注释掉 /etc/profile 文件和~/.bashrc文件中，含 LD_LIBRARY_PATH 的行
然后更新source ~/.bashrc