Add colors to interpolated values in argparse

Author: alexprengere

Lib/argparse.py

@@ -674,6 +674,11 @@ def _expand_help(self, action):
                 params[name] = value.__name__
         if params.get('choices') is not None:
             params['choices'] = ', '.join(map(str, params['choices']))
+        # Adding colors to params values
+        t = self._theme
+        for name in params:
+            value = params[name]
+            params[name] = f"{t.default_value}{value}{t.reset}"
         return help_string % params
 
     def _iter_indented_subactions(self, action):