PIP reports an error could not find a version that satisfies the... No matching distribution

Anaconda Installation is often full , Network error and other problems , Although the image address has been configured , A lot of ways have been tried , The following template is the easiest to succeed ：

pip install  library   -i  Mirror address  --trusted-host  domain name 

for example ：

pip install pandas  -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com