From: Guido van Rossum <guido@python.org>
Date: Mon, 20 Sep 1999 00:39:47 +0000 (+0000)
Subject: Peter Haight discovered that this code uses a mutable default for cnf
X-Git-Tag: v1.6a1~911
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ea7364c7cd989b78767efff2720b0e17db6eeb0b;p=thirdparty%2FPython%2Fcpython.git

Peter Haight discovered that this code uses a mutable default for cnf
and then (under certain circumstances) can clobber the default!
He also submitted this patch as PR#82.
---

diff --git a/Lib/lib-tk/ScrolledText.py b/Lib/lib-tk/ScrolledText.py
index f1c2bb08afe5..05b728a5ab17 100644
--- a/Lib/lib-tk/ScrolledText.py
+++ b/Lib/lib-tk/ScrolledText.py
@@ -14,7 +14,9 @@ from Tkinter import *
 from Tkinter import _cnfmerge
 
 class ScrolledText(Text):
-	def __init__(self, master=None, cnf={}, **kw):
+	def __init__(self, master=None, cnf=None, **kw):
+		if cnf is None:
+			cnf = {}
 		if kw:
 			cnf = _cnfmerge((cnf, kw))
 		fcnf = {}