Util string_to_list with braces (#1361)

* Allow braces to encapsulate whitespace in Util.string_to_list

* Tests for string_to_list with braces

mpf/core/utility_functions.py

@@ -102,8 +102,12 @@ def string_to_list(string: Union[str, List[str], None]) -> List[str]:
 
         """
         if isinstance(string, str):
-            # Convert commas to spaces, then split the string into a list
-            new_list = string.replace(',', ' ').split()
+            if "{" in string:
+                # Split the string on spaces/commas EXCEPT regions within braces
+                new_list = re.findall(r'([\w|-]+?\{.*?\}|[\w|-]+)', string)
+            else:
+                # Convert commas to spaces, then split the string into a list
+                new_list = string.replace(",", " ").split()
             # Look for string values of "None" and convert them to Nonetypes.
             for index, value in enumerate(new_list):
                 if isinstance(value, str) and len(value) == 4 and value.lower() == 'none':

mpf/tests/test_Utility_Functions.py

@@ -55,6 +55,13 @@ def test_string_to_list(self):
         self.assertEqual(type(result), list)
         self.assertFalse(result)
 
+        my_string = '0 1 2{not split here} 3 4 5'
+        result = Util.string_to_list(my_string)
+        self.assertEqual(type(result), list)
+        self.assertEqual(result[1], '1')
+        self.assertEqual(result[2], '2{not split here}')
+        self.assertEqual(result[3], '3')
+
     def test_string_to_lowercase_list(self):
         my_string = 'A B c d e'
         result = Util.string_to_lowercase_list(my_string)