Classifiers are one bit of Python project metadata that predates PyPI.
 Classifiers are weird.
 They were around in setuptools days, and are still here with pyproject.toml. 
- What are they? 
 - Why do we need them? 
 - Do we need them?
 - Which classifiers should I include?
 - Why are they called "trove classifiers" in the Python docs
 
Brett Cannon joins the show to discuss these wacky bits of metadata.
Here's an example, from pytest-crayons:
[project]
...
classifiers = [
    "License :: OSI Approved :: MIT License",
    "Framework :: Pytest"
    ]
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