WARNING: The directory '/home/zhex/.cache/pip/http' or its parent directory is not owned by the curr

This worked for me:
sudo chown -R root /home/$USERNAME/.cache/pip/

sudo chown -R root /home/$USERNAME/.cache/pip/http/
————————————————
版权声明：本文为CSDN博主「zhe_csdn」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/zhe_csdn/article/details/99430519