在某些情况下，我们需要查看第三方包的依赖包和被依赖包：
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pip show pkg_name 命令输出的 Requires 和 Required-by
(archiver_venv)[root@HC-25-28-38 archiver_all]# pip show celery DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. Name: celery Version: 4.2.1 Summary: Distributed Task Queue. Home-page: http://celeryproject.org Author: Ask Solem Author-email: [email protected] License: BSD Location: /export/servers/archiver_all/archiver_venv/lib/python2.7/site-packages/celery-4.2.1-py2.7.egg Requires: pytz, billiard, kombu Required-by: django-celery-beat, django-celery-results, flower (archiver_venv)[root@HC-25-28-38 archiver_all]# -
pipdeptree -p pkg_name 能显示所有的依赖包及其子包,推荐用这个
指定 pip 源安装包：
pip3 install -r requirements.txt -i https://pypi.douban.com/simple
