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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 get_hash(self):
 """Generate and return the dict index hash of the given queue item. Note: Cookies should not be included in the hash calculation because otherwise requests are crawled multiple times with e.g. different session keys, causing infinite crawling recursion. Note: At this moment the keys do not actually get hashed since it works perfectly without and since hashing the keys requires us to built hash collision management. Returns: str: The hash of the given queue item. """


        if self.__index_hash:
            return self.__index_hash

        key = self.request.method

        key += URLHelper.get_protocol(self.request.url)
        key += URLHelper.get_subdomain(self.request.url)
        key += URLHelper.get_hostname(self.request.url)
        key += URLHelper.get_tld(self.request.url)
        key += URLHelper.get_path(self.request.url)

        key += str(URLHelper.get_ordered_params(self.request.url))

        if self.request.data is not None:
            key += str(self.request.data.keys())

        self.__index_hash = key
        return self.__index_hash