From 86296ad2cd5702a66b05aae79ec9196b62e41e9a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Sun, 7 Feb 2016 08:13:04 +0600
Subject: [PATCH] [utils] Add ability to control skipping false values in
 dict_get

---
 test/test_utils.py  | 13 +++++++++++--
 youtube_dl/utils.py |  7 ++++---
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/test/test_utils.py b/test/test_utils.py
index e3dd019af..909d0e51d 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -452,9 +452,15 @@ class TestUtil(unittest.TestCase):
         self.assertTrue(isinstance(data, bytes))
 
     def test_dict_get(self):
-        d = {
-            'a': 42,
+        FALSE_VALUES = {
+            'none': None,
+            'false': False,
+            'zero': 0,
+            'empty_string': '',
+            'empty_list': [],
         }
+        d = FALSE_VALUES.copy()
+        d['a'] = 42
         self.assertEqual(dict_get(d, 'a'), 42)
         self.assertEqual(dict_get(d, 'b'), None)
         self.assertEqual(dict_get(d, 'b', 42), 42)
@@ -463,6 +469,9 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(dict_get(d, ('b', 'c', 'a', 'd', )), 42)
         self.assertEqual(dict_get(d, ('b', 'c', )), None)
         self.assertEqual(dict_get(d, ('b', 'c', ), 42), 42)
+        for key, false_value in FALSE_VALUES.items():
+            self.assertEqual(dict_get(d, ('b', 'c', key, )), None)
+            self.assertEqual(dict_get(d, ('b', 'c', key, ), skip_false_values=False), false_value)
 
     def test_encode_compat_str(self):
         self.assertEqual(encode_compat_str(b'\xd1\x82\xd0\xb5\xd1\x81\xd1\x82', 'utf-8'), 'тест')
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 652dba59d..f3b0180ab 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1717,11 +1717,12 @@ def encode_dict(d, encoding='utf-8'):
     return dict((encode(k), encode(v)) for k, v in d.items())
 
 
-def dict_get(d, key_or_keys, default=None):
+def dict_get(d, key_or_keys, default=None, skip_false_values=True):
     if isinstance(key_or_keys, (list, tuple)):
         for key in key_or_keys:
-            if d.get(key):
-                return d[key]
+            if key not in d or d[key] is None or skip_false_values and not d[key]:
+                continue
+            return d[key]
         return default
     return d.get(key_or_keys, default)