From ed9266db90023500e687aa634b55e11742c2e18c Mon Sep 17 00:00:00 2001
From: Philipp Hagemeister <phihag@phihag.de>
Date: Sun, 28 Sep 2014 09:31:58 +0200
Subject: [common] Add new helper function _match_id

---
 youtube_dl/extractor/common.py | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'youtube_dl/extractor/common.py')

diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 403791e6b..8d6a6f601 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -165,6 +165,14 @@ class InfoExtractor(object):
             cls._VALID_URL_RE = re.compile(cls._VALID_URL)
         return cls._VALID_URL_RE.match(url) is not None
 
+    @classmethod
+    def _match_id(cls, url):
+        if '_VALID_URL_RE' not in cls.__dict__:
+            cls._VALID_URL_RE = re.compile(cls._VALID_URL)
+        m = cls._VALID_URL_RE.match(url)
+        assert m
+        return m.group('id')
+
     @classmethod
     def working(cls):
         """Getter method for _WORKING."""
-- 
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