pip安装时出现INFO: This is taking longer than usual. You might need to provide the dependency resolver with stricter constraints to reduce runtime. See https://pip.pypa.io/warnings/backtracking for guidance. If you want to abort this run, press Ctrl + C.无限依赖问题导致无法正常安装
解决方法:更新pip
pip install --upgrade pip
如果还不行则继续升级系统的包管理器
sudo apt update
sudo apt upgrade