python修改pip源解决安装很慢的问题

家目录下面创建文件/.pip/pip.conf linux在：~/.pip/pip.conf写入如下内容

[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
 
[install]
trusted-host=mirrors.aliyun.com

# Search for packages
pip search SomePackage

# Install some packages
pip install SomePackage

# Install some package in user space
pip install --user SomePackage

# Upgrade some package
pip install --upgrade SomePackage

# Output and install packages in a requirement file
pip freeze > requirements.txt
pip install -r requirements.txt

# Show details of a package
pip show SomePackage

# List outdated packages
pip list --outdated

# Upgrade all outdated packages, thanks to http://stackoverflow.com/a/3452888
pip freeze --local | grep -v '^\-e' | cut -d = -f 1 | xargs -n1 pip install -U

# Upgrade outdated packages on latest version of pip
pip list --outdated --format=freeze | cut -d = -f 1 | xargs -n1 pip install -U

# Install specific version of a package
pip install -I SomePackage1==1.1.0 'SomePackage2>=1.0.4'