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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 decode_list(cls, obj, element_type):
 # type: (List[Any], ConjureTypeType) -> List[Any] """Decodes json into a list, handling conversion of the elements. Args: obj: the json object to decode element_type: a class object which is the conjure type of the elements in this list. Returns: A python list where the elements are instances of type element_type. """

        if not isinstance(obj, list):
            raise Exception("expected a python list")

        return list(map(lambda x: cls.do_decode(x, element_type), obj))