Code snippet

import maya.api.OpenMaya as om2
import maya.cmds as cmds
#get single selected object
[selected] = cmds.ls(selection=True)
def getMobj(object):
selList = om2.MSelectionList()
selList.add(object)
if selList:
objectGroup = selList.getDependNode(0)
objectDep = om2.MFnDependencyNode(objectGroup)
return objectDep
selMob = getMobj(selected)
vis = selMob.findPlug('visibility',False)
print vis