Resetting controller's transform with pymel

A tricky way to reset ctrl transform is to multiply the ctrl and the parent group matrices together and put the result to the parent then zero out ctrl transform. Whola! You got zeroed out ctrl where you put it.

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import pymel.core as pm
import maya.OpenMaya as om

def resetChannelBox(obj):
cbAttr = ['tx', 'ty', 'tz', 'rx', 'ry', 'rz', 'sx', 'sy', 'sz']
for a in cbAttr:
attr = obj.attr(a)
locked = False

if attr.isLocked() == True and obj.isReferenced() == False:
attr.unlock()
locked = True
try:
if 's' in a:
attr.set(1.00)
else:
attr.set(0.00)
except:
return False

if locked == True:
attr.lock()

return True


def resetCtrlTransform(objs=[]) :
if not objs:
objs = pm.selected(type='transform')
if not objs:
return

for obj in objs:
offsetGrp = obj.getParent()
if not offsetGrp:
om.MGlobal.displayWarning('%s  has no parent. Continue.' %obj.nodeName())
continue

srcMtx = obj.getMatrix()
grpMtx = offsetGrp.getMatrix()
resultMtx = srcMtx * grpMtx

offsetGrp.setMatrix(resultMtx)
resetChannelBox(obj)

if isinstance(obj, pm.nt.Joint) == True:
obj.jointOrient.set([0.0, 0.0, 0.0])


resetCtrlTransform()