<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def call_list(self):
 """For a call object that represents multiple calls, `call_list` returns a list of all the intermediate calls as well as the final call."""

        vals = []
        thing = self
        while thing is not None:
            if thing.from_kall:
                vals.append(thing)
            thing = thing.parent
        return _CallList(reversed(vals))