sklearn.utils.validation.check_is_fitted(estimator, attributes, msg=None, all_or_any=<built-in function all>)
[source]
Perform is_fitted validation for estimator.
Checks if the estimator is fitted by verifying the presence of “all_or_any” of the passed attributes and raises a NotFittedError with the given message.
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Licensed under the 3-clause BSD License.
http://scikit-learn.org/stable/modules/generated/sklearn.utils.validation.check_is_fitted.html