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eyeD3
eyeD3 is a Python module and command line program for processing ID3 tags. Information about mp3 files (i.e bit rate, sample frequency, play time, etc.) is also provided. The formats supported are ID3v1 (1.0/1.1) and ID3v2 (2.3/2.4).
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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.
Disclaimer: I don't think the eyeD3 library will break your mp3s when it's reading/writing ID3 tags, but it probably makes sense to work on a copy of your original mp3s, in case something goes amiss.
NOTE:
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Hence, a higher number means a more popular project.