1，PyPI查找包

• pip3 search

╰─➤  pip3 search selenium
selenium (3.141.0)                       - Python bindings for Selenium

2，安装包

• pip3 install

╰─➤  pip3 install selenium

3，列出已安装的包

• pip3 list

╰─➤  pwd
astroid           2.2.5
certifi           2019.3.9
chardet           3.0.4
Click             7.0
colorama          0.4.1
delegator.py      0.1.1

╰─➤  pip3 list | grep selenium
selenium          3.141.0

4，显示已安装软件包的信息

• pip3 show

╰─➤  pip3 show selenium
Name: selenium
Version: 3.141.0
Summary: Python bindings for Selenium