Error: valueerror: check when installing scikit image library with PIP_ hostname requires server_ hostname

Valueerror: check_ hostname requires server_ Hostname is usually due to version conflict and other reasons. After looking up the experience of many big men on the Internet, we finally find that the problem is caused by the network agent, which is commonly known as the VPN problem.

After the VPN is turned off, the problem is solved, and the scikit image library is successfully installed!