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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _save_trace(self):
 """ Save current stack trace as formatted string. """

        stack_trace = stack()
        try:
            self.trace = []
            for frm in stack_trace[5:]: # eliminate our own overhead
                self.trace.insert(0, frm[1:])
        finally:
            del stack_trace