def checkprocess(script):

       assert script.check()

       old = tmpdir.ensure(script.basename, dir=1).chdir()

       try:

           if iswin32:

               cmd = script.basename

           else:

               cmd = "%s" %(script, )

           if script.basename.startswith("py.lookup"):

               cmd += " hello"

           print "executing", script

           try:

->             py.process.cmdexec(cmd)

           except py.process.cmdexec.Error, e:

               if cmd.find("py.rest") != -1 and \

                  e.out.find("module named") != -1:

                   return

               raise

       finally:

           old.chdir()