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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_lambda_function(self, function_name):
 """ Returns the lambda function ARN, given a name This requires the "lambda:GetFunction" role. """

        response = self.lambda_client.get_function(
                FunctionName=function_name)
        return response['Configuration']['FunctionArn']