How to use the scour.scour.scourXmlFile function in scour

def runTest(self):
        options = ScourOptions
        options.invalidOption = "invalid value"
        try:
            scourXmlFile('unittests/ids-to-strip.svg', options)
            fail = False
        except Exception:
            fail = True
        self.assertEqual(fail, False,
                         'Exception when calling Scour with invalid options')

def runTest(self):
        doc = scourXmlFile('unittests/transform-translate-is-identity.svg')
        self.assertEqual(doc.getElementsByTagName('line')[0].getAttribute('transform'), '',
                         'Transform containing identity translation not removed')

def runTest(self):
        doc = scourXmlFile('unittests/groups-in-switch-with-id.svg',
                           parse_args(['--enable-id-stripping']))
        self.assertEqual(doc.getElementsByTagName('g').length, 1,
                         'Erroneously removed a 

def runTest(self):
        doc = scourXmlFile('unittests/collapse-gradients-gradientUnits.svg')
        self.assertEqual(doc.getElementsByTagNameNS(SVGNS, 'radialGradient')[0].getAttribute('gradientUnits'), '',
                         'gradientUnits not properly overrode when collapsing gradients')

def runTest(self):
        doc = scourXmlFile('unittests/xml-space.svg')
        self.assertNotEqual(doc.documentElement.getAttribute('xml:space'), '',
                            "'xml:space' attribute removed from root SVG element"
                            "when '--strip-xml-space' was NOT specified")
        self.assertNotEqual(doc.getElementById('text1').getAttribute('xml:space'), '',
                            "'xml:space' attribute removed from a child element "
                            "when '--strip-xml-space' was NOT specified (should never be removed!)")

def runTest(self):
        doc = scourXmlFile('unittests/path-truncate-zeros-calc.svg')
        path = doc.getElementsByTagNameNS(SVGNS, 'path')[0].getAttribute('d')
        self.assertEqual(path, 'm5.81 0h0.1',
                         'Trailing zeros not removed from path data after calculation')

def runTest(self):
        doc = scourXmlFile('unittests/unreferenced-radialGradient.svg')
        self.assertEqual(len(doc.getElementsByTagNameNS(SVGNS, 'radialradient')), 0,
                         'Unreferenced radialGradient not removed')

def runTest(self):
        svgdoc = scourXmlFile('unittests/remove-duplicate-gradients-master-without-id.svg')
        lingrads = svgdoc.getElementsByTagNameNS(SVGNS, 'linearGradient')
        rect = svgdoc.getElementById('r1')
        self.assertEqual(1, lingrads.length,
                         'Duplicate linearGradient not removed')
        self.assertEqual(lingrads[0].getAttribute("id"), "g1",
                         "linearGradient has a proper ID")
        self.assertNotEqual(rect.getAttribute("fill"), "url(#)",
                            "linearGradient has a proper ID")

def runTest(self):
        r = scourXmlFile('unittests/font-styles.svg').getElementsByTagNameNS(SVGNS, 'rect')[0]
        self.assertEqual(r.getAttribute('font-size'), '',
                         'font-size not removed from rect')

def runTest(self):
        p = scourXmlFile('unittests/path-with-closepath.svg').getElementsByTagNameNS(SVGNS, 'path')[0]
        self.assertEqual(p.getAttribute('d'), 'm10 10h100v100h-100z',
                         'Path with closepath not preserved')