9 print "*** This script is just for test use. It will crash!"    11 ctrack= test04.Track()
    12 print "<<< ref#(ctrack)=", sys.getrefcount(ctrack)
    13 cstep= ctrack.GetStep3()
    14 print "<<< ref#(ctrack, cstep)=",\
    15       sys.getrefcount(ctrack),\
    16       sys.getrefcount(cstep)
    18 print "<<< delete cstep"    19 print "<<< ref#(ctrack)=", sys.getrefcount(ctrack)
    23 cstep= ctrack.GetStep3()
    25 print "<<< previous step is still remain?"    29 print "--- stderr ---"