How to use the planet.shell.run function in planet

def test_xhtml2html_filter(self):
        testfile = 'tests/data/filter/index.html'
        filter = 'xhtml2html.plugin?quote_attr_values=True'
        output = shell.run(filter, open(testfile).read(), mode="filter")
        self.assertTrue(output.find('/>')<0)
        self.assertTrue(output.find('')>=0)

def test_addsearch_filter(self):
        testfile = 'tests/data/filter/index.html'
        filter = 'addsearch.xslt'
        output = shell.run(filter, open(testfile).read(), mode="filter")
        self.assertTrue(output.find('<h2>Search</h2>')&gt;=0)
        self.assertTrue(output.find('<form><input name="q"></form>')&gt;=0)
        self.assertTrue(output.find(' href="http://planet.intertwingly.net/opensearchdescription.xml"')&gt;=0)
        self.assertTrue(output.find('')&gt;=0)

def test_regexp_filter(self):
        config.load('tests/data/filter/regexp-sifter.ini')

        testfile = 'tests/data/filter/category-one.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertEqual('', output)

        testfile = 'tests/data/filter/category-two.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertNotEqual('', output)

def test_xslt_filter(self):
        config.load('tests/data/filter/translate.ini')
        testfile = 'tests/data/filter/category-one.xml'

        input = open(testfile).read()
        output = shell.run(config.filters()[0], input, mode="filter")
        dom = xml.dom.minidom.parseString(output)
        catterm = dom.getElementsByTagName('category')[0].getAttribute('term')
        self.assertEqual('OnE', catterm)

def verify_xpath(self):
        testfile = 'tests/data/filter/category-one.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertEqual('', output)

        testfile = 'tests/data/filter/category-two.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertNotEqual('', output)

def test_stripAd_yahoo(self):
        testfile = 'tests/data/filter/stripAd-yahoo.xml'
        config.load('tests/data/filter/stripAd-yahoo.ini')

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        dom = xml.dom.minidom.parseString(output)
        excerpt = dom.getElementsByTagName('content')[0]
        self.assertEqual(u'before--after',
            excerpt.firstChild.firstChild.nodeValue)

def test_excerpt_lorem_ipsum(self):
        testfile = 'tests/data/filter/excerpt-lorem-ipsum.xml'
        config.load('tests/data/filter/excerpt-lorem-ipsum.ini')

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        dom = xml.dom.minidom.parseString(output)
        excerpt = dom.getElementsByTagName('planet:excerpt')[0]
        self.assertEqual(u'Lorem ipsum dolor sit amet, consectetuer ' +
            u'adipiscing elit. Nullam velit. Vivamus tincidunt, erat ' +
            u'in \u2026', excerpt.firstChild.firstChild.nodeValue)

def test_regexp_filter2(self):
        config.load('tests/data/filter/regexp-sifter2.ini')

        testfile = 'tests/data/filter/category-one.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertNotEqual('', output)

        testfile = 'tests/data/filter/category-two.xml'

        output = open(testfile).read()
        for filter in config.filters():
            output = shell.run(filter, output, mode="filter")

        self.assertEqual('', output)

def data2config(data, cached_config):
            if content_type(list).find('opml')>=0:
                opml.opml2config(data, cached_config)
            elif content_type(list).find('foaf')>=0:
                foaf.foaf2config(data, cached_config)
            elif content_type(list).find('csv')>=0:
                csv_config.csv2config(data, cached_config)
            elif content_type(list).find('config')>=0:
                cached_config.readfp(data)
            else:
                from planet import shell
                import StringIO
                cached_config.readfp(StringIO.StringIO(shell.run(
                    content_type(list), data.getvalue(), mode="filter")))

            if cached_config.sections() in [[], [list]]: 
                raise Exception