def process_lines(self, haml_lines):
        root = RootNode(**self.options_dict)
        line_iter = iter(haml_lines)

        haml_node=None
        for line_number, line in enumerate(line_iter):
            node_lines = line

            if not root.parent_of(HamlNode(line)).inside_filter_node():
                if line.count('{') - line.count('}') == 1:
                    start_multiline=line_number # For exception handling

                    while line.count('{') - line.count('}') != -1:
                        try:
                            line = line_iter.next()
                        except __HOLE__:
                            raise Exception('No closing brace found for multi-line HAML beginning at line %s' % (start_multiline+1))
                        node_lines += line

            # Blank lines
            if haml_node is not None and len(node_lines.strip()) == 0:
                haml_node.newlines += 1
            else:
                haml_node = create_node(node_lines)
                if haml_node:
                    root.add_node(haml_node)

        if self.options_dict and self.options_dict.get('debug_tree'):
            return root.debug_tree()
        else:
            return root.render()
dataset/ETHPy150Open jessemiller/HamlPy/hamlpy/hamlpy.py/Compiler.process_lines