Insert UI elements into existing layouts

[Anonymous]

For example I would like to add an button to the shelf and I query the shelf with this:

import maya.cmds as cmds

a = cmds.layout('Shelf', query = True, childArray = True)
b = cmds.layout(a, query = True, childArray = True)
c = cmds.layout(b, query = True, childArray = True)
d = cmds.layout(c[1], query = True, childArray = True)
e = cmds.layout(d[1], query = True, childArray = True)
print e

Its only an example! I would like to add a button by script between 'shelfButton1' and 'shelfButton2', the first and second element of 'e'.
This is a shorter and easier to understand version of my actual problem.
Hope you can help!

[olarn]

Would setParent work?

see example.

http://help.autodesk.com/cloudhelp/2018/ENU/Maya-Tech-Docs/CommandsPython/setParent.html