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ripgrep
ripgrep recursively searches directories for a regex pattern while respecting your gitignore
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
One of the projects I'm currently refactoring is a service-less game manager experiment (i.e. something where you point it at a folder and it builds a game launcher database without referring to a service like Steam or GOG.com for the metadata) with a Qt frontend in Python and a backend that's being migrated into Rust using PyO3.
Also, not specifically with Python, Rust is great at making little CLI utilities that start and run fast, so it's great for tools like ripgrep and hyperfine which you use while developing Python, even if you don't use them in the same codebase as Python code.