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I needed to write a program to automatically cleanup some of ID3 information in my mp3 files. I also wanted to do it in Python, since of all languages that I know well, I’m most productive in python.
After some research I concluded that the best but little known option is mutagen library.
It’s written in pure pyth0n, can both read and write ID3 tags as well as FLAC and Vorbis tags and has a nice API. It’s largely undocumented but you can figure things out by looking at its code and a sample program.
I also looked at eyed3 but it has much worse API and id3reader, but it can only read and has just been abandoned.
According to Google mutagen isn’t a popular way to process id3 information in mp3 files, but it seems to be the best.