使用:

import color

class Color(color.Color):
    ...

如果这是 Python 2.x，您还需要从 object 派生 color.Color，使其成为 新式类:

If this were Python 2.x, you would also want to derive color.Color from object, to make it a new-style class:

class Color(object):
    ...

这在 Python 3.x 中不是必需的.

This is not necessary in Python 3.x.