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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 count(self, eventRegistry):
 """ return the number of articles that match the criteria @param eventRegistry: instance of EventRegistry class. used to obtain the necessary data """

        self.setRequestedResult(RequestEventArticles(**self.queryParams))
        res = eventRegistry.execQuery(self)
        if "error" in res:
            print(res["error"])
        count = res.get(self.queryParams["eventUri"], {}).get("articles", {}).get("totalResults", 0)
        return count