<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def put(properties, ttl=None, ctx=None):
 """Decorator dedicated to put properties on an element. """


    def put_on(elt):
        return put_properties(elt=elt, properties=properties, ttl=ttl, ctx=ctx)

    return put_on