[utils] Add "yesterday" as a date keyword

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index a95d2c942f35dbbe1cd8402698b398b3a887d45a..75f9594e6c8abcecfe128af1be2e73575d6eecc1 100644 (file)
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -712,8 +712,10 @@ def date_from_str(date_str):
     Return a datetime object from a string in the format YYYYMMDD or
     (now|today)[+-][0-9](day|week|month|year)(s)?"""
     today = datetime.date.today()
-    if date_str == 'now'or date_str == 'today':
+    if date_str in ('now', 'today'):
         return today
+    if date_str == 'yesterday':
+        return today - datetime.timedelta(days=1)
     match = re.match('(now|today)(?P<sign>[+-])(?P<time>\d+)(?P<unit>day|week|month|year)(s)?', date_str)
     if match is not None:
         sign = match.group('sign')