use yml data structures with python parser

scm/yaml_parser.scm

@@ -0,0 +1,10 @@
+(use-modules (ice-9 popen) (ice-9 textual-ports) (json parser))
+
+(define (yml-file->scm filename)
+  (let* ((python_cmd (string-append "import sys, yaml, json; print(json.dumps(yaml.safe_load(open('" filename "'))))"))
+          (pipe (open-pipe* OPEN_READ "python" "-c" python_cmd))
+          (json (get-string-all pipe)))
+    (close-pipe pipe)
+    (json-string->scm json)))
+
+(define (parse-yml-file filename) (resolve-inherits (yml-file->scm filename)))