Problem when run demo.py

[binhmuc]

Hi all,
I got this problem:
"lightgbm.basic.LightGBMError: Do not support special JSON characters in feature name."
How should i do now :(

[hexiaoyupku]

I got the same error. Have you solved the problem?

[binhmuc]

I cannot :'(

[mglowacki100]

@binhmuc
@hexiaoyupku
I'm not DeepBlueAI team member and I don't have full info to replicate this issue exactly, but it seems it could be replicated just with newest LightGBM version 2.3.1 on ubuntu.
To avoid this you need to downgrade LightGBM; for me it works with version 2.2.3
Hope this helps.

[YifanDengWHU]

It is because the LightGBM didn't support Chinese characters in the feature name, just replace them with numbers like:

X_train.columns = list(range(X_train.shape[1]))