From 75f620db198071eb2af98032c6d33804eb88503f Mon Sep 17 00:00:00 2001
From: bchao1 <whereisbrianchao520@gmail.com>
Date: Sun, 13 Sep 2020 12:46:42 +0800
Subject: [PATCH] fix encounter NoneType in Input valid()

---
 bullet/client.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/bullet/client.py b/bullet/client.py
index c120e84..be3b061 100644
--- a/bullet/client.py
+++ b/bullet/client.py
@@ -426,6 +426,8 @@ def __init__(
         self.pattern = pattern
     
     def valid(self, ans):
+        if ans is None:
+            return False
         if not bool(re.match(self.pattern, ans)):
             utils.moveCursorUp(1)
             utils.forceWrite(' ' * self.indent + self.prompt + self.default)