diff --git a/Lib/difflib.py b/Lib/difflib.py
index fa8c287..e31259a 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -213,6 +213,10 @@
# (at least 200 elements) and x accounts for more than 1 + 1% of
# its elements (when autojunk is enabled).
# DOES NOT WORK for x in a!
+ # bjunk
+ # the items in b for which isjunk is True.
+ # bpopular
+ # nonjunk items in b treated as junk by the heuristic (if used).
self.isjunk = isjunk
self.a = self.b = None
@@ -321,7 +325,7 @@
indices.append(i)
# Purge junk elements
- junk = set()
+ self.bjunk = junk = set()
isjunk = self.isjunk
if isjunk:
for elt in list(b2j.keys()): # using list() since b2j is modified
@@ -330,7 +334,7 @@
del b2j[elt]
# Purge popular elements that are not junk
- popular = set()
+ self.bpopular = popular = set()
n = len(b)
if self.autojunk and n >= 200:
ntest = n // 100 + 1