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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 routeDefault(self, request, year=None):
 """Route a request to the default calendar view."""

        eventsView = request.GET.get('view', self.default_view)
        if eventsView in ("L", "list"):
            return self.serveUpcoming(request)
        elif eventsView in ("W", "weekly"):
            return self.serveWeek(request, year)
        else:
            return self.serveMonth(request, year)