A very complicated class dealing with HTML documents

class Filler:

    def __init__(self, template):
        self.string_template = template
        self.parsed_template = self.parse(string_template)

    def render(self, tasks):
        pending_task_node = self.acquire('vtodo-task-pending')
        done_task_node = self.acquire('vtodo-task-pending')

        for task in tasks:
            if task.status == "pending":
                task_node = pending_task_node
            elif task.status == "done":
                task_node = done_task_node

            self.insert(pending_task_node, {
                'vtodo-task-title': task.title
            })

        return self.result()

    def parse(self, template):
        document = xml.dom.minidom.parseString(template)
        css_class_dict = get_css_class_dict(document)

        return document, css_class_dict

    def acquire(self, cssClass):
        pass

    def insert(self, node, values_dict):
        pass

    def result(self):
        pass