Show HN: Leaderboard of most downloaded PyPI packages

Merged ideas from https://hugovk.github.io/top-pypi-packages/

and Kaggle leaderboards.

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Shows list of top 1.5% (8000 out of 520,000) most downloaded PyPI packages.

Metric - the number of downloads in the past 30 days.

Also shows the change in:

- relative standing - the percent increase / decrease with respect to the last measurement.