That should be:
node indicator = estimator.tree_.decision_path(X_test)

PR welcome :) 

On Sun, Aug 28, 2016, 13:12 Ibrahim Dalal via scikit-learn <scikit-learn@python.org> wrote:
Dear Developers,

DecisionTreeClassifier.decision_path() as used here http://scikit-learn.org/dev/auto_examples/tree/unveil_tree_structure.html is giving the following error:

AttributeError: 'DecisionTreeClassifier' object has no attribute 'decision_path'

Kindly help.

Thanks
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