supysonic/dict2xml.py

"""
	Simple xml serializer.

	@author Reimund Trost 2013

	Example:

	mydict = {
		'name': 'The Andersson\'s',
		'size': 4,
		'children': {
			'total-age': 62,
			'child': [
				{ 'name': 'Tom', 'sex': 'male', },
				{
					'name': 'Betty',
					'sex': 'female',
					'grandchildren': {
						'grandchild': [
							{ 'name': 'herbert', 'sex': 'male', },
							{ 'name': 'lisa', 'sex': 'female', }
						]
					},
				}
			]
		},
	}

	print(dict2xml(mydict, 'family'))

	Output:

	  <family name="The Andersson's" size="4">
		<children total-age="62">
		  <child name="Tom" sex="male"/>
		  <child name="Betty" sex="female">
			<grandchildren>
			  <grandchild name="herbert" sex="male"/>
			  <grandchild name="lisa" sex="female"/>
			</grandchildren>
		  </child>
		</children>
	  </family>
"""

from xml.dom.minidom import Text

def dict2xml(d, root_node=None):
	wrap          =     False if None == root_node or isinstance(d, list) else True
	root          = 'objects' if None == root_node else root_node
	root_singular = root[:-1] if 's' == root[-1] and None == root_node else root
	xml           = ''
	children      = []

	if isinstance(d, dict):
		for key, value in dict.items(d):
			if isinstance(value, dict):
				children.append(dict2xml(value, key))
			elif isinstance(value, list):
				children.append(dict2xml(value, key))
			else:
                                t = Text()
                                t.data = unicode(value)
				xml = xml + ' ' + key + '="' + t.toxml() + '"'
	else:
		for value in d:
			children.append(dict2xml(value, root_singular))

	end_tag = '>' if 0 < len(children) else '/>'

	if wrap or isinstance(d, dict):
		xml = '<' + root + xml + end_tag

	if 0 < len(children):
		for child in children:
			xml = xml + child

		if wrap or isinstance(d, dict):
			xml = xml + '</' + root + '>'

	return xml