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