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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 current_pointing(self, index):
 """set the color of the currently selected pointing to 'blue'"""

        if self.current is not None:
            for item in self.pointings[self.current]['items']:
                self.itemconfigure(item, outline="black")
        self.current = index
        for item in self.pointings[self.current]['items']:
            self.itemconfigure(item, outline="blue")