pip --upgrade批量更新过期的python库

• 列出所有已过期的库
  pip list --outdated

• 单个更新库名
  pip install --upgrade 库名

• 批量更新

import pip 
from subprocess import call 
  
for dist in pip.get_installed_distributions(): 
    call("pip install --upgrade " + dist.project_name, shell=True)