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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 _format_value(self, value):
 """ Format a value with packagename, if not already set :param value: :return: """

        if len(value) > 0:
            if value[0] == ".":
                value = self.package + value
            else:
                v_dot = value.find(".")
                if v_dot == 0:
                    value = self.package + "." + value
                elif v_dot == -1:
                    value = self.package + "." + value
        return value