AM_Offset py2.7

#Simple window to offset transforms from your selection

import maya.cmds as mc
import functools

def ot_offset(_):
    selection = mc.ls(selection=True)
    mc.select(d=True)

    for n in selection:
        mc.setAttr(n + '.tx', mc.floatField(tx, query=True, value=True) + mc.getAttr(n + '.tx'))
        mc.setAttr(n + '.ty', mc.floatField(ty, query=True, value=True) + mc.getAttr(n + '.ty'))
        mc.setAttr(n + '.tz', mc.floatField(tz, query=True, value=True) + mc.getAttr(n + '.tz'))
        mc.setAttr(n + '.rx', mc.floatField(rx, query=True, value=True) + mc.getAttr(n + '.rx'))
        mc.setAttr(n + '.ry', mc.floatField(ry, query=True, value=True) + mc.getAttr(n + '.ry'))
        mc.setAttr(n + '.rz', mc.floatField(rz, query=True, value=True) + mc.getAttr(n + '.rz'))
        mc.setAttr(n + '.sx', mc.floatField(sx, query=True, value=True) + mc.getAttr(n + '.sx'))
        mc.setAttr(n + '.sy', mc.floatField(sy, query=True, value=True) + mc.getAttr(n + '.sy'))
        mc.setAttr(n + '.sz', mc.floatField(sz, query=True, value=True) + mc.getAttr(n + '.sz'))

# Set window
def close_callback(window, _):
    print "Close!", window
    mc.deleteUI(window, window=True)

if mc.window("offsetTransform", query=True, exists=True):
    mc.deleteUI("offsetTransform", window=True)

window = mc.window("offsetTransform", title="Offset transform Tool", widthHeight=(250, 100))
mc.columnLayout(adjustableColumn=True)
mc.columnLayout( columnAlign=('center'), rowSpacing=1)
mc.text(label='Translate')
tx = mc.floatField(value=0)
ty = mc.floatField(value=0)
tz = mc.floatField(value=0)
mc.text( label='Rotate')
rx = mc.floatField(value=0)
ry = mc.floatField(value=0)
rz = mc.floatField(value=0)
mc.text( label='Scale')
sx = mc.floatField(value=0)
sy = mc.floatField(value=0)
sz = mc.floatField(value=0)
mc.button(label='Offset', command=(ot_offset))
mc.button(label="Close", command=functools.partial(close_callback, window))
mc.setParent('..')
mc.showWindow(window)