+import yaml
+
+
+def finalize_for_yaml(elem):
+ """Render Jinja2 output specifically for YAML files"""
+ # Jinaj2 by default converts None to 'None', we can't allow this
+ # we could convert to empty string '', or we can convert to null, aka ~
+ if elem is None:
+ return '~'
+ # convert data structures to inline YAML
+ # match builtin types because we shouldn't be trying to render complex types
+ if isinstance(elem, (dict, list)):
+ # remove newlines because we are injecting back into YAML
+ # use block style for single line
+ return yaml.safe_dump(elem, default_flow_style=True).replace('\n', '')
+ return elem