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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 invoke_lambda_function( self, function_name, payload, invocation_type='Event', log_type='Tail', client_context=None, qualifier=None ):
 """ Directly invoke a named Lambda function with a payload. Returns the response. """

        return self.lambda_client.invoke(
            FunctionName=function_name,
            InvocationType=invocation_type,
            LogType=log_type,
            Payload=payload
        )