From 99b4fbb081c73c2f1eefcb5f749778081bd5d4e5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Sat, 28 Nov 2015 01:46:34 +0100
Subject: [PATCH] implement text.extract_iter

---
 gallery_dl/text.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gallery_dl/text.py b/gallery_dl/text.py
index b1c42719..c4a2a0f7 100644
--- a/gallery_dl/text.py
+++ b/gallery_dl/text.py
@@ -99,6 +99,14 @@ def extract_all(txt, rules, pos=0, values=None):
             values[key] = result
     return values, pos
 
+def extract_iter(txt, begin, end, pos=0):
+    """Yield all values obtained by repeated calls to text.extract"""
+    while True:
+        value, pos = extract(txt, begin, end, pos)
+        if value is None:
+            return
+        yield value
+
 if platform.system() == "Windows":
     clean_path = clean_path_windows
 else: