List groups and geometry inside each one

[abelvargas]

Hello,

I'm trying to create two separate lists.

1 - List of all top level groups

2 - List of all geometry inside all of them

My outliner looks like this:

+building01_grp

    building01_geo01

    building01_geo02

    building01_geo03

+building02_grp

    building02_geo01

    building02_geo02

    building02_geo03

+building03_grp

    building03_geo01

    building03_geo02

    building03_geo03

So ideally the lists would look like

buildingList = ["building01_grp", "building02_grp", "building03_grp"]

geometryList =["building01_geo01", "building01_geo02", "building01_geo03", ... , "building03_geo03"]

I'm ok with using selected nodes since there will always be a top group, like so:

import maya.cmds as cmds

buildingList = cmds.ls(long = True, selection = True, type = 'dagNode')

I can't figure out how to iterate based on the selected group names (or just straight up list all geometry) into another list.

How would you go about this?

Thank you

[osidedan · Accepted solution]

Hello! you probably need to use a combination of the maya command listRelatives, and Python's append, which can append items to a list. Here's an example that should work for what you need:

import maya.cmds as cmds

building_list = cmds.ls(selection=True)
geometry_list = []
for this_group in building_list:
    group_items = cmds.listRelatives(this_group)
    if group_items == None:
        pass
    else:
        for item in group_items:
            geometry_list.append(item)
print building_list
print geometry_list
    

That should work, and let me know if you need more info on that!

[abelvargas]

Thanks a lot for the help! That makes total sense 😄