revert changes in io.selective input (None to Ellipsis)

rx7/io.py

@@ -24,10 +24,10 @@ def wait_for_input(prompt="") -> str:
     return answer
 
 
-def selective_input(prompt:Any, choices:Iterable|Callable[[str],bool], default:Any=None,
+def selective_input(prompt:Any, choices:Iterable|Callable[[str],bool], default:Any=...,
                     *,
                     ignore_case:bool=False, invalid_message:Any='Invalid input',
-                    pre_action:Callable=None,post_action:Callable=None) -> str|Any:
+                    pre_action:Callable=...,post_action:Callable=...) -> str|Any:
     """Prompts for user input and waits until a acceptable input is given
 
     Args:
@@ -50,8 +50,8 @@ def selective_input(prompt:Any, choices:Iterable|Callable[[str],bool], default:A
     Returns:
         str|Any: user input as a string unless pre_action/post_action change the string type
     """
-    assert (callable(pre_action )  or  pre_action ==None)
-    assert (callable(post_action)  or  post_action==None)
+    assert (callable(pre_action )  or  pre_action ==...)
+    assert (callable(post_action)  or  post_action==...)
     if not callable(choices):
         Choices = choices
         if type(choices) == dict:
@@ -69,7 +69,7 @@ def selective_input(prompt:Any, choices:Iterable|Callable[[str],bool], default:A
             elif invalid_message:
                 style.print(invalid_message, color='red')
         elif inp == "":
-            if default:
+            if default != ...:
                 inp = default
                 break
             else: