class newc:

    def __enter__(self):

        print("enter of newc\n")

        return self



    def __exit__(self,type,value,trace):

        print("exit of newc\n")

        print("type:", type)

        print("value:", value)

        print("trace:", trace)



    def fun(self):

        print("fun in newc:\n")



with newc() as ppt:

    ppt.fun()

    print("exit\n")