From fd20093c9639e8faffd9b4e3cb068e749663dea0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Thu, 8 Oct 2020 14:55:21 +0200
Subject: [PATCH] allow blacklist/whitelist to be empty lists/strings (#1051)

---
 gallery_dl/job.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gallery_dl/job.py b/gallery_dl/job.py
index 47ff9a5d..b62240b5 100644
--- a/gallery_dl/job.py
+++ b/gallery_dl/job.py
@@ -453,7 +453,7 @@ class DownloadJob(Job):
 
     def _build_blacklist(self):
         wlist = self.extractor.config("whitelist")
-        if wlist:
+        if wlist is not None:
             if isinstance(wlist, str):
                 wlist = wlist.split(",")
             blist = {e.category for e in extractor._list_classes()}
@@ -461,7 +461,7 @@ class DownloadJob(Job):
             return blist
 
         blist = self.extractor.config("blacklist")
-        if blist:
+        if blist is not None:
             if isinstance(blist, str):
                 blist = blist.split(",")
             blist = set(blist)