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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def filled_rectangle(self, x0, y0, x1, y1):
 """Draw a filled rectangle"""

        x0, y0, x1, y1 = self.rect_helper(x0, y0, x1, y1)
        for x in range(x0, x1 + 1):
            for y in range(y0, y1 + 1):
                self.point(x, y, self.color)