Constructs a new estimator with the same parameters.
Clone does a deep copy of the model in an estimator without actually copying attached data. It yields a new estimator with the same parameters that has not been fit on any data.
estimator: estimator object, or list, tuple or set of objects :
The estimator or group of estimators to be cloned
safe: boolean, optional :
If safe is false, clone will fall back to a deepcopy on objects that are not estimators.