With Poetry, packaging in Python is a solved problem

 poetry show --tree
requests-toolbelt 0.8.0 A utility belt for advanced users...
└── requests <3.0.0,>=2.0.1
    ├── certifi >=2017.4.17
    ├── chardet >=3.0.2,<3.1.0
    ├── idna >=2.5,<2.7
    └── urllib3 <1.23,>=1.21.1

 poetry show --latest
pendulum 2.0.4   1.4.5 Python datetimes made easy.
django   1.11.11 2.0.3 A high-level Python Web framework ...
requests 2.18.4  2.18.4 Python HTTP for Humans.

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