analyze_json.py return ZeroDivisionError in analyzing itg about ddc HOT 4 OPEN

Not sure. Try downloading the exact ITG zips that we used in 2017 from here: https://drive.google.com/drive/folders/1lAQMDtXRk5nMo6acAU8p5G_nhmuMY0XR?usp=sharing

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If that doesn't work I can dig a little deeper

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sorry, it doesn't work, same result.
(diff command return nothing when compare one I downloaded by myself and your drive's.)
I don't have enough coding skill but I'll try to understand situation of the error, thanks

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I found cause of zero division of analyze_json.py.

some songs of the ITG/ITG2 don't have EXPERT(Challenge) chart,
and coarse_to_beats is defined as defaultdict(set),
Therefore, len(coarse_to_beats['Challenge']) return 0 without exception at line 81,
but stop at line 83 by zero division.

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