From a6e436e4b4f94062f274746fc5d109e4203bf658 Mon Sep 17 00:00:00 2001
From: Gustavo Niemeyer <gustavo@niemeyer.net>
Date: Sat, 14 Feb 2004 00:02:45 +0000
Subject: - Fixed #853061: allow BZ2Compressor.compress() to receive an empty
 string   as parameter.

---
 Misc/NEWS           | 3 +++
 Modules/bz2module.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/Misc/NEWS b/Misc/NEWS
index 275593b..47e2859 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -226,6 +226,9 @@ Extension modules
 - itertools.izip() with no arguments now returns an empty iterator instead
   of raising a TypeError exception.
 
+- Fixed #853061: allow BZ2Compressor.compress() to receive an empty string
+  as parameter.
+
 Library
 -------
 
diff --git a/Modules/bz2module.c b/Modules/bz2module.c
index 82d35ae..c75011d 100644
--- a/Modules/bz2module.c
+++ b/Modules/bz2module.c
@@ -1503,6 +1503,9 @@ BZ2Comp_compress(BZ2CompObject *self, PyObject *args)
 	if (!PyArg_ParseTuple(args, "s#", &data, &datasize))
 		return NULL;
 
+	if (datasize == 0)
+		return PyString_FromString("");
+
 	ACQUIRE_LOCK(self);
 	if (!self->running) {
 		PyErr_SetString(PyExc_ValueError,
-- 
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