Turn object sequence on and off in Maya

maya_objseq.py

from maya.cmds import *

numObjs = 19
objPrefix = "vectorsquid"
objSuffix = ":polySurface1"
t = 0
tDelta = 5

for i in range(numObjs):
	currentTime(t)
	for j in range(numObjs):
		temp = objPrefix + str(j+1) + objSuffix
		setAttr(temp + ".visibility",0)
		setKeyframe(temp + ".v")
	temp = "vectorsquid" + str(i+1) + objSuffix
	setAttr(temp + ".visibility",1)
	setKeyframe(temp + ".v")
	t += tDelta