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docs/source/whatsnew/pr/improve-autoreload.md

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+magic `%autoreload 2` now captures new methods added to classes. Earlier, only methods existing as of the initial import were being tracked and updated.  
+
+This new feature helps dual environement development - Jupyter+IDE - where the code gradually moves from notebook cells to package files, as it gets structured.
+
+**Example**: An instance of the class `MyClass` will be able to access the method `cube()` after it is uncommented and the file `file1.py` saved on disk.
+
+````python
+# notebook
+
+from mymodule import MyClass
+first = MyClass(5)
+````
+
+````python
+# mymodule/file1.py
+
+class MyClass:
+
+    def __init__(self, a=10):
+        self.a = a
+
+    def square(self):
+        print('compute square')
+        return self.a*self.a
+
+    # def cube(self):
+    #     print('compute cube')
+    #     return self.a*self.a*self.a
+````
+