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Extract Artist And Title From A Song Title String

Extract the artist and the title of the song from a string formatted as: ARTIST - TITLE.EXT
This code strips the extension, splits the string, trims each part and capitalize it correctly (fixed pythons string.title() bug for handling apostrophes)

#filename = "rihanna - please don't stop the music.pdf"
artist, title = [re.sub("([a-zA-Z])'([A-Z])", lambda m: m.group(1) + "'" + m.group(2).lower(), t.strip().title()) for t in filename[:filename.rfind('.')].split('-')]

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