比如我安装了requests_html这个包，我想查看这个包的相关信息，可以如下操作：
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PS C:\Users\Tesla Lau> pip show requests_html
Name: requests-html
Version: 0.9.0
Summary: HTML Parsing for Humans.
Home-page: https://github.com/kennethreitz/requests-html
Author: Kenneth Reitz
Author-email: me@kennethreitz.org
License: MIT
Location: c:\users\tesla lau\appdata\local\programs\python\python37-32\lib\site-packages
Requires: w3lib, pyquery, requests, fake-useragent, parse, pyppeteer, bs4
Required-by:
