+ def parse_include_tag(self, tag):
+ # Remove 'include(' prefix and trailing ')'
+ filename = tag[len('include('):].rstrip(')')
+
+ if not filename:
+ err('No argument for include().')
+
+ return filename
+
+ def include_file(self, filename):
+ fragment = self.load_yaml(filename)
+ return yaml.dump(fragment, default_flow_style=False)
+