transform.py 文件源码-python代码片段

transform.py 文件源码

python

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def select(self, path):
        """Mark events matching the given XPath expression, within the current
        selection.

        >>> html = HTML('<body>Some <em>test</em> text</body>', encoding='utf-8')
        >>> print(html | Transformer().select('.//em').trace())
        (None, ('START', (QName('body'), Attrs()), (None, 1, 0)))
        (None, ('TEXT', u'Some ', (None, 1, 6)))
        ('ENTER', ('START', (QName('em'), Attrs()), (None, 1, 11)))
        ('INSIDE', ('TEXT', u'test', (None, 1, 15)))
        ('EXIT', ('END', QName('em'), (None, 1, 19)))
        (None, ('TEXT', u' text', (None, 1, 24)))
        (None, ('END', QName('body'), (None, 1, 29)))
        <body>Some <em>test</em> text</body>

        :param path: an XPath expression (as string) or a `Path` instance
        :return: the stream augmented by transformation marks
        :rtype: `Transformer`
        """
        return self.apply(SelectTransformation(path))