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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 uid_something_colon(self, node):
 """ Creates op_pos for node from uid to colon """

        node.op_pos = [
            NodeWithPosition(node.uid, (node.first_line, node.first_col))
        ]
        position = (node.body[0].first_line, node.body[0].first_col)
        last, first = self.operators[':'].find_previous(position)
        node.op_pos.append(NodeWithPosition(last, first))
        return last