PyWPS process part

def __init__(self):

        # Process initialization
        WPSProcess.__init__(self,
                identifier = "knn_qgis",
                title="grass_pokus",
                abstract="""ess of PyWPS, returns
                the same file, it gets on input, as the output.""",
                version = "1.0.0",
                storeSupported = "true",
                statusSupported = "true",
                grassLocation = True,

                )# Adding process outputs


     self.vystupOut = self.addComplexOutput(
                        identifier="result",
                        title="composite picture",
                        useMapscript=True,
                        formats=[
                        {'mimeType': 'image/tiff'},
                        {'mimeType': 'image/geotiff'},
                        {'mimeType': 'application/geotiff'},
                        {'mimeType': 'application/x-geotiff'}]
                        )