import maya.OpenMaya as om # API 1.0
import maya.api.OpenMaya as newom # API 2.0
# API 1.0
selList = om.MSelectionList()
om.MGlobal.getActiveSelectionList(selList)
# API 2.0
mySel = newom.MGlobal.getActiveSelectionList()
displayError显示错误信息
# API 1.0
om.MGlobal.displayError("error message")
# API 2.0
newom.MGlobal.displayError("error message")
# API 1.0
selList = om.MSelectionList()
om.MGlobal.getSelectionListByName("pCube1", selList)
# API 2.0
mySel = newom.MGlobal.getSelectionListByName("pCube1")