how do you create a meta-strip (group of strips) in the VSE using python? I want to use python to create a series of strips and group them into a meta-strip.  I have noticed there are several new_ methods on scene.sequence_editor.sequences such as new_clip(), new_effect(), new_image(), new_mask(), new_movie(), new_scene(), new_sound() but there is not one for the meta-strip.

What is the proper API to use to create a meta strip from several other strips?

def make_meta(scn, strip_list):
    # magic goes here

strip_list = make_parts(scn)
make_meta(scn, strip_list)
There might be no low-level RNA method to create or make a meta strip, but you can still use the operator:

bpy.ops.sequencer.meta_make()


Make sure you select all relevant strips before you call it.