events.py 文件源码

def group_by_type(self, select_types: List[str] = None) -> 'EventGroupList':
        """
        Groups events by type

        Attributes
        ----------
        select_types
            A list of types for which to select groups in the resulting EventGroupList.
            If no types are specified, all resulting groups will be selected.

        Returns
        -------
        An EventGroupList partitioned by type
        """
        if select_types is None:
            select_types = []

        groups = [EventList(list(group), end=self.end) for index, group in groupby(self, key=attrgetter('__class__'))]
        if not select_types:
            selected_groups = groups
        else:
            selected_groups = [group for group in groups if group.type in select_types]

        return EventGroupList(groups, selected=selected_groups)