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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 loadTopicPageFromER(self, uri):
 """ load an existing topic page from Event Registry based on the topic page URI @param uri: uri of the topic page saved in your Event Registry account """

        params = {
            "action": "getTopicPageJson",
            "includeConceptDescription": True,
            "includeTopicPageDefinition": True,
            "includeTopicPageOwner": True,
            "uri": uri
        }
        self.topicPage = self._createEmptyTopicPage()
        self.concept = self.eventRegistry.jsonRequest("/json/topicPage", params)
        self.topicPage.update(self.concept.get("topicPage", {}))