[Python] How to extend a class in python?

In python how can you extend a class? For example if I have

color.py

class Color:
def __init__(self, color):
self.color = color
def getcolor(self):
return self.color


color_extended.py

import Color

class Color:
def getcolor(self):
return self.color + " extended!"


But this doesn't work... I expect that if I work in color_extended.py, then when I make a color object and use the getcolor function then it will return the object with the string " extended!" in the end. Also it should have gotton the init from the import.

Assume python 3.1

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