feat(pySD): error is edit of param fails

pySD/editconfigfile.py

@@ -23,16 +23,21 @@
 def update_param(node, param, new_value):
     '''Function to recursively searches for 'param' key in YAML node
     and updates it's value to with 'new_value' when found '''
+
+    is_success = False
     if isinstance(node, dict):
         if param in node:
             node[param] = new_value # update value
+            is_success = True
         else:
             for key, val in node.items():
                 update_param(val, param, new_value)
     elif isinstance(node, list):
         for item in node:
             update_param(item, param, new_value)
 
+    return is_success
+
 def edit_config_params(filename, params2change):
     ''' rewrites config YAML file with key,value pairs listed in params2change updated to new values
     whilst preserving original YAML file's formatting and comments etc. '''
@@ -45,7 +50,11 @@ def edit_config_params(filename, params2change):
 
     # Update the parameters from the YAML file
     for param, new_value in params2change.items():
-        update_param(data, param, new_value)
+        is_success = update_param(data, param, new_value)
+
+        if not is_success:
+          errmsg = param+"could not be updated to new value: "+str(new_value)
+          raise ValueError(errmsg)
 
     # Overwrite the YAML file
     with open(filename, 'w') as file: