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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 batch(self, methods):
 """ Given a list of create, update or delete methods to call, call all of them in a single batch operation. """

        methods = list(methods) # methods can be iterator
        if not methods:
            #accepts also empty list (or generator) - it allows call batch directly with query result (eventually empty)
            return
        queries, callbacks = list(zip(*[m(batch=True) for m in methods]))
        # perform all the operations in one batch
        responses = self.execute("", "POST", requests=queries)
        # perform the callbacks with the response data (updating the existing
        # objets, etc)

        batched_errors = []
        for callback, response in zip(callbacks, responses):
            if "success" in response:
                callback(response["success"])
            else:
                batched_errors.append(response["error"])

        if batched_errors:
            raise core.ParseBatchError(batched_errors)