modified warm_start check

maheshakya · maheshakya · commit 9a41f2f2836d · 2014-04-01T16:05:05.000+05:30
diff --git a/sklearn/feature_selection/from_model.py b/sklearn/feature_selection/from_model.py
@@ -189,7 +189,7 @@ def fit(self, X, y, **fit_params):
         self : object
             Returns self.
         """
-        if not self.warm_start or not hasattr(self, "estimator_"):
+        if not (self.warm_start and hasattr(self,"estimator_")):
             self.estimator_ = clone(self.estimator)
 
         self.estimator_.fit(X, y, **fit_params)
