youtube-dl

commit 329ca3bef695bff011ed9b2d5f03e1331bf5bf0f
parent 2c3322e36ef23eb0566b820dd8e8711de20ed963
Author: Sergey M․ <dstftw@gmail.com>
Date:   Sun, 12 Jun 2016 06:05:34 +0700

[utils] Add try_get

To reduce boilerplate when accessing JSON

Diffstat:
M
youtube_dl/utils.py
 | 
10
++++++++++

1 file changed, 10 insertions(+), 0 deletions(-)
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
@@ -1901,6 +1901,16 @@ def dict_get(d, key_or_keys, default=None, skip_false_values=True):
     return d.get(key_or_keys, default)
 
 
+def try_get(src, getter, expected_type=None):
+    try:
+        v = getter(src)
+    except (AttributeError, KeyError, TypeError, IndexError):
+        pass
+    else:
+        if expected_type is None or isinstance(v, expected_type):
+            return v
+
+
 def encode_compat_str(string, encoding=preferredencoding(), errors='strict'):
     return string if isinstance(string, compat_str) else compat_str(string, encoding, errors)