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InfluxDB
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For option 2, you can see an example in this old project of mine: https://github.com/Diapolo10/RPGenie/blob/master/tests/test_classes.py
And for the third one, a recent one (uses Poetry and pyproject.toml): https://github.com/Diapolo10/iplib3
NOTE:
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Hence, a higher number means a more popular project.