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00001 """StyleSheetList implements DOM Level 2 Style Sheets StyleSheetList."""
__all__ = ['StyleSheetList']
__docformat__ = 'restructuredtext'
__version__ = '$Id: stylesheetlist.py 1629 2009-01-04 18:58:47Z cthedot $'

00006 class StyleSheetList(list):
    """Interface `StyleSheetList` (introduced in DOM Level 2)

    The `StyleSheetList` interface provides the abstraction of an ordered
    collection of :class:`~cssutils.stylesheets.StyleSheet` objects.

    The items in the `StyleSheetList` are accessible via an integral index,
    starting from 0.

    This Python implementation is based on a standard Python list so e.g.
    allows ``examplelist[index]`` usage.
00018     def item(self, index):
        Used to retrieve a style sheet by ordinal `index`. If `index` is
        greater than or equal to the number of style sheets in the list,
        this returns ``None``.
            return self[index]
        except IndexError:
            return None

    length = property(lambda self: len(self),
        doc="The number of :class:`StyleSheet` objects in the list. The range"
        "  of valid child stylesheet indices is 0 to length-1 inclusive.")

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