maya 得到点的位置

import maya.cmds as cmds

cmds.pointPosition( 'curve1.cv[3]' )
# Returns the (x,y,z) world position of curve1's 3rd CV.

cmds.pointPosition( 'particle1.pt[1]', l=True )
# Returns the (x,y,z) local position of the particle point.

# 得到选择物体的位置
obj = selected()[0]
for v in obj.vtx:
    print v.getPosition()

v = PyNode('pCube1.vtx[2]')
v.getPosition()