From c7e327c4d46a9b72f3f707710194dccf6eee50d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Sun, 10 Sep 2017 19:08:39 +0700
Subject: [PATCH] [utils] Introduce bool_or_none

---
 youtube_dl/utils.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 2554a2abd..c42dd4c3a 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1815,6 +1815,10 @@ def float_or_none(v, scale=1, invscale=1, default=None):
         return default
 
 
+def bool_or_none(v, default=None):
+    return v if isinstance(v, bool) else default
+
+
 def strip_or_none(v):
     return None if v is None else v.strip()