python - ubuntu下载http://mirrors.aliyuncs.com/pypi/simple flask报错，怎么解决？

Question

pip install -i http://mirrors.aliyuncs.com/pypi/simple flask flask-login flask-openid flask-mail sqlalchemy flask-sqlalchemy sqlalchemy-migrate flask-whooshalchemy flask-wtf pytz flask-babel flup
Collecting flask

Could not find a version that satisfies the requirement flask (from versions: )
No matching distribution found for flask

Answer 1

has been perfectly solved, Douban’s flask-sqlalchemy reported an error,

Using the image of Tsinghua University

Answer 2

Just use Douban’s source

Answer 3

http://pypi.douban.com/simple # Douban
http://pypi.hustunique.com/simple #华中UST大学
http://pypi.sdutlinux.org/ simple #山东理工大学
http://pypi.mirrors.ustc.edu.cn/simple #中国科技大学