【Python】help()について

クラス参照するときにhelp()関数を使うとJupyter notebook内で参照できるため便利

import sklearn
import sklearn.linear_model
help(sklearn.linear_model.Perceptron)

下のような説明が出てくる.

Help on class Perceptron in module sklearn.linear_model.perceptron:

class Perceptron(sklearn.linear_model.stochastic_gradient.BaseSGDClassifier, sklearn.feature_selection.from_model._LearntSelectorMixin)
 |  Perceptron
 |  
 |  Read more in the :ref:`User Guide <perceptron>`.
 |  
 |  Parameters
 |  ----------
 |  
 |  penalty : None, 'l2' or 'l1' or 'elasticnet'
 |      The penalty (aka regularization term) to be used. Defaults to None.
 |  
~~~~~~~~~~~~~~~~~~~~~~~~~~~