Source code for pygal.etree

# -*- coding: utf-8 -*-
# This file is part of pygal
# A python svg graph plotting library
# Copyright © 2012-2016 Kozea
# This library is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
# You should have received a copy of the GNU Lesser General Public License
# along with pygal. If not, see <>.
Wrapper for seamless lxml.etree / xml.etree usage
depending on whether lxml is installed or not.

import os

[docs]class Etree(object): """Etree wrapper using lxml.etree or standard xml.etree""" def __init__(self): """Create the wrapper""" from xml.etree import ElementTree as _py_etree self._py_etree = _py_etree try: from lxml import etree as _lxml_etree self._lxml_etree = _lxml_etree except ImportError: self._lxml_etree = None if os.getenv('NO_LXML', None): self._etree = self._py_etree else: self._etree = self._lxml_etree or self._py_etree self.lxml = self._etree is self._lxml_etree def __getattribute__(self, attr): """Retrieve attr from current active etree implementation""" if (attr not in object.__getattribute__(self, '__dict__') and attr not in Etree.__dict__): return object.__getattribute__(self._etree, attr) return object.__getattribute__(self, attr)
[docs] def to_lxml(self): """Force lxml.etree to be used""" self._etree = self._lxml_etree self.lxml = True
[docs] def to_etree(self): """Force xml.etree to be used""" self._etree = self._py_etree self.lxml = False
etree = Etree()