fixes #136

scabha/validate.py

@@ -3,7 +3,7 @@
 import os.path
 import yaml
 import re
-import typing
+import keyword
 from typing import *
 from collections import OrderedDict
 
@@ -176,9 +176,13 @@ def validate_parameters(params: Dict[str, Any], schemas: Dict[str, Any],
         value = inputs.get(name, UNSET)
         if value is not UNSET:
             # sanitize name: dataclass won't take hyphens or periods
-            fldname = re.sub("\W", "_", name)
-            while fldname in field2name:
-                fldname += "_"
+            fldname = re.sub("\\W", "_", name)
+            # avoid Python keywords and clashes with other field names by adding _x as needed
+            num = 0
+            while keyword.iskeyword(fldname) or keyword.issoftkeyword(fldname) or fldname in field2name:
+                fldname += f"_{num}"
+                num += 1
+            # add to mapping
             field2name[fldname] = name
             name2field[name] = fldname
 

tests/stimela_tests/test_recipe.yml

@@ -102,6 +102,12 @@ recipe:
     elemlist-xyz:
       dtype: Union[str, List[str]]
       element_choices: [x,y,z]
+    elemlist_xyz:
+      default: "deliberate use of _ vs - to check validate() avoiding this situation"
+    continue:
+      default: "deliberate use of Python keyword to make sure validate() doesn't barf"
+    with:
+      default: "deliberate use of Python keyword to make sure validate() doesn't barf"
 
 
   assign: