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-rw-r--r--youtube_dl/utils.py13
1 files changed, 11 insertions, 2 deletions
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 6978a10e4..8ec70f93c 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1570,9 +1570,12 @@ class PagedList(object):
class OnDemandPagedList(PagedList):
- def __init__(self, pagefunc, pagesize):
+ def __init__(self, pagefunc, pagesize, use_cache=False):
self._pagefunc = pagefunc
self._pagesize = pagesize
+ self._use_cache = use_cache
+ if use_cache:
+ self._cache = {}
def getslice(self, start=0, end=None):
res = []
@@ -1582,7 +1585,13 @@ class OnDemandPagedList(PagedList):
if start >= nextfirstid:
continue
- page_results = list(self._pagefunc(pagenum))
+ page_results = None
+ if self._use_cache:
+ page_results = self._cache.get(pagenum)
+ if page_results is None:
+ page_results = list(self._pagefunc(pagenum))
+ if self._use_cache:
+ self._cache[pagenum] = page_results
startv = (
start % self._pagesize