NotFittedError#
- exception sklearn.exceptions.NotFittedError[source]#
Exception class to raise if estimator is used before fitting.
This class inherits from both ValueError and AttributeError to help with exception handling and backward compatibility.
Examples
>>> from sklearn.svm import LinearSVC >>> from sklearn.exceptions import NotFittedError >>> try: ... LinearSVC().predict([[1, 2], [2, 3], [3, 4]]) ... except NotFittedError as e: ... print(repr(e)) NotFittedError("This LinearSVC instance is not fitted yet. Call 'fit' with appropriate arguments before using this estimator."...)
Changed in version 0.18: Moved from sklearn.utils.validation.