LightGBM example fails about website HOT 1 CLOSED

@yuzisun thanks for the quick fix! Unfortunately, #171 has a bug. While the key "feature_names" (plural) is correct for the object returned by sklearn.datasets.load_iris, the parameter for lightgbm.Dataset is named feature_name (singular). With the #171 example I get:

Traceback (most recent call last):
  File "train.py", line 38, in <module>
    main()
  File "train.py", line 23, in main
    dtrain = lgb.Dataset(X, label=y, feature_names=iris['feature_names'])
TypeError: __init__() got an unexpected keyword argument 'feature_names'

Should I make a new ticket for this?

from website.