items() not iteritems()

python_solution.py

@@ -1,12 +1,14 @@
 
+def refine_val(x: string):
+    return int(x) if x.isnumeric() else True if x == "true" else False if x == "false" else x
 def refine_parameters(data: dict):
-    '''Refine the parameters of a dictionary
-
-    Returns:
-        Return a dictionary of cleaned input
-    '''
     clean_dict = {}
-
-    # Write your code here.
+    for key, value in data.items(): #iteritems is only python 2! oops
+        if isinstance(value, dict):
+            clean_dict[key] = refine_parameters(value)
+        elif isinstance(value, list):
+            clean_dict[key] = [refine_val(x) for x in value] 
+        else:
+            clean_dict[key] = refine_val(value)
 
     return clean_dict