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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
import re
def attrsfilter(elements,keywords,operation='or'):
"""
Function to filter elements by its attributes
@param elements A list of elements to be filtered
@param keywords A dictionary containing required tags and its values
@param operation A string, either 'or' or 'and', for operation selection
@return A list of filtered elements by attributes
"""
retval = []
if not keywords: return elements
if operation == 'or':
for element in elements:
for key in keywords:
if element.attrib.has_key(key):
if element.attrib[key] == keywords[key]:
retval.append(element)
break
elif operation == 'and':
for element in elements:
for key in keywords:
if not element.attrib.has_key(key): break
if element.attrib[key] != keywords[key]: break
retval.append(element)
return retval
def get_element_tag(element):
"""
Function to get the element tag without namespace
@param element An element which will be extracted the tag name
@return A string, containing the tag name without namespace
"""
tag = re.match('{.*?}(.*)',element.tag)
if tag:
return tag.group(1)
else:
return tag
def get_child_value(element,childname):
"""
Function to get the value of an element's child element
@param element An element to be queried
@param childname A string, containing the tagname of the child
@return A string containing child's text value if child is a leaf element,
or a ElementTree element if child is a parent to 1 or more elements
"""
for c in element.getchildren():
if get_element_tag(c) == childname:
if c.getchildren():
return c
else:
return c.text
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