selection.py 文件源码

def __init__(self, selection_list=None, flags=None):
        if not selection_list:
            self.data = []

        super().__init__(selection_list, flags=flags)

        if selection_list:
            assert issubclass(type(selection_list), col.Sequence), \
                "selection_dict must be a subclass of collections.Sequence, not {}".format(
                    type(selection_list))
            self.data = selection_list

        # if values in the selection_list are SelectionMembers update
        # their registries
        for idx, member in enumerate(self.data):
            if issubclass(type(member), SelectionMember):
                member.register_selection(idx, self, flags=flags)