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?? __init__.py(3.33 KB)
?? __init__.pyc(3.3 KB)
?? __init__.pyo(3.3 KB)
?? base.py(13.62 KB)
?? base.pyc(13.94 KB)
?? base.pyo(13.81 KB)
?? dom.py(8.63 KB)
?? dom.pyc(11.39 KB)
?? dom.pyo(11.39 KB)
?? etree.py(12.46 KB)
?? etree.pyc(14.44 KB)
?? etree.pyo(14.32 KB)
?? etree_lxml.py(13.83 KB)
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Editing: init.py

"""A collection of modules for building different kinds of tree from
HTML documents.

To create a treebuilder for a new type of tree, you need to do
implement several things:

1) A set of classes for various types of elements: Document, Doctype,
Comment, Element. These must implement the interface of
_base.treebuilders.Node (although comment nodes have a different
signature for their constructor, see treebuilders.etree.Comment)
Textual content may also be implemented as another node type, or not, as
your tree implementation requires.

2) A treebuilder object (called TreeBuilder by convention) that
inherits from treebuilders._base.TreeBuilder. This has 4 required attributes:
documentClass - the class to use for the bottommost node of a document
elementClass - the class to use for HTML Elements
commentClass - the class to use for comments
doctypeClass - the class to use for doctypes
It also has one required method:
getDocument - Returns the root node of the complete document tree

3) If you wish to run the unit tests, you must also create a
testSerializer method on your treebuilder which accepts a node and
returns a string containing Node and its children serialized according
to the format used in the unittests
"""

from __future__ import absolute_import, division, unicode_literals

from .._utils import default_etree

treeBuilderCache = {}

def getTreeBuilder(treeType, implementation=None, **kwargs):
    """Get a TreeBuilder class for various types of tree with built-in support

treeType - the name of the tree type required (case-insensitive). Supported
               values are:

"dom" - A generic builder for DOM implementations, defaulting to
                       a xml.dom.minidom based implementation.
               "etree" - A generic builder for tree implementations exposing an
                         ElementTree-like interface, defaulting to
                         xml.etree.cElementTree if available and
                         xml.etree.ElementTree if not.
               "lxml" - A etree-based builder for lxml.etree, handling
                        limitations of lxml's implementation.

implementation - (Currently applies to the "etree" and "dom" tree types). A
                      module implementing the tree type e.g.
                      xml.etree.ElementTree or xml.etree.cElementTree."""

treeType = treeType.lower()
    if treeType not in treeBuilderCache:
        if treeType == "dom":
            from . import dom
            # Come up with a sane default (pref. from the stdlib)
            if implementation is None:
                from xml.dom import minidom
                implementation = minidom
            # NEVER cache here, caching is done in the dom submodule
            return dom.getDomModule(implementation, **kwargs).TreeBuilder
        elif treeType == "lxml":
            from . import etree_lxml
            treeBuilderCache[treeType] = etree_lxml.TreeBuilder
        elif treeType == "etree":
            from . import etree
            if implementation is None:
                implementation = default_etree
            # NEVER cache here, caching is done in the etree submodule
            return etree.getETreeModule(implementation, **kwargs).TreeBuilder
        else:
            raise ValueError("""Unrecognised treebuilder "%s" """ % treeType)
    return treeBuilderCache.get(treeType)

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