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[utils] Add dict_get convenience method

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This commit is contained in:
Sergey M․ 2016-02-07 06:12:53 +06:00
parent b8b465af3e
commit cbecc9b903
2 changed files with 23 additions and 0 deletions
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14
test/test_utils.py
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@ -22,6 +22,7 @@ from youtube_dl.utils import (
DateRange,
detect_exe_version,
determine_ext,
dict_get,
encode_compat_str,
encodeFilename,
escape_rfc3986,
@ -450,6 +451,19 @@ class TestUtil(unittest.TestCase):
data = urlencode_postdata({'username': 'foo@bar.com', 'password': '1234'})
self.assertTrue(isinstance(data, bytes))
def test_dict_get(self):
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)
self.assertEqual(dict_get(d, ('a', )), 42)
self.assertEqual(dict_get(d, ('b', 'a', )), 42)
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)
def test_encode_compat_str(self):
self.assertEqual(encode_compat_str(b'\xd1\x82\xd0\xb5\xd1\x81\xd1\x82', 'utf-8'), 'тест')
self.assertEqual(encode_compat_str('тест', 'utf-8'), 'тест')

9
youtube_dl/utils.py
View File

@ -1717,6 +1717,15 @@ 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):
if isinstance(key_or_keys, (list, tuple)):
for key in key_or_keys:
if d.get(key):
return d[key]
return default
return d.get(key_or_keys, default)
def encode_compat_str(string, encoding=preferredencoding(), errors='strict'):
return string if isinstance(string, compat_str) else compat_str(string, encoding, errors)