def parse(self, filename):
svg = Svg()
doc = xml.dom.minidom.parse(filename)
path_tags = doc.getElementsByTagName('path')
parser = PathParser()
for path_tag in path_tags:
id, path = parser.parse(path_tag)
svg.add_path(id, path)
x, y = svg.get_boundary().get_centroid()
for path in svg.paths.values():
path.offset(-x, -y)
return svg
