Python 依赖库管理pip、pipreqs、pigar、pip-tools、pipdeptree

# -*- coding: utf-8 -*-
import mysql.connector
import flask
from bs4 import BeautifulSoup

$ pip freeze > requirements.txt
mysql-connector-python==8.0.17
Flask==1.1.1
beautifulsoup4==4.8.1
Django==2.2.5
...
# 省略剩下的依赖库

pip install pipreqs

$ pipreqs --force
Flask==1.1.1
beautifulsoup4==4.8.1
mysql_connector_repackaged==0.3.1

pip install pigar

$ pigar -s bs4
==================================
PACKAGE        | VERSION | WHERE
---------------+---------+------
beautifulsoup4 | 4.8.1   | local
==================================

$ pigar
# Requirements automatically generated by pigar.
# https://github.com/damnever/pigar
# main.py: 4
Flask == 1.1.1
# main.py: 5
beautifulsoup4 == 4.8.1
# main.py: 3
mysql_connector_python == 8.0.17

pip install pip-tools

$ pip-compile requirements.ini
#
# This file is autogenerated by pip-compile
# To update, run:
#
#    pip-compile requirements.ini
#
--index-url https://pypi.tuna.tsinghua.edu.cn/simple
flask==1.1.1

$ pip-sync requirements.txt
# 注意，不在requirements.txt 文件中的库会被卸载

pip install pipdeptree

$ pipdeptree --freeze > requirements.txt
Flask==1.1.1
  Click==7.0
  itsdangerous
  Jinja2
  Werkzeug
setuptools==41.0.1
wheel==0.33.4