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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 get_item(self, key):
 """ Returns the value associated with the key. """

        keys = list(self.keys())

        # make sure it exists
        if not key in keys:
            self.print_message("ERROR: '"+str(key)+"' not found.")
            return None

        try:
            x = eval(self.get_value(1,keys.index(key)))
            return x

        except:
            self.print_message("ERROR: '"+str(self.get_value(1,keys.index(key)))+"' cannot be evaluated.")
            return None