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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_position(self, analysis_uid):
 """Returns a list with the position for the analysis_uid passed in within the current worksheet in accordance with the current layout, where the first item from the list returned is the slot and the second is the position of the analysis within the slot. :param analysis_uid: uid of the analysis the position is requested :return: the position (slot + position within slot) of the analysis :rtype: list """

        str_position = self.uids_strpositions.get(analysis_uid, "")
        tokens = str_position.split(":")
        if len(tokens) != 2:
            return None
        return [to_int(tokens[0]), to_int(tokens[1])]