commit daf17e9bc8aa4aae570d9746a724ba5f3fdc7cb9
author Victor Stinner <victor.stinner@haypocalc.com> Wed May 25 22:52:37 2011 +0200
committer Victor Stinner <victor.stinner@haypocalc.com> Wed May 25 22:52:37 2011 +0200
tree 95d10cf2f029b0e2bdccd9bbd8fcf6193c739e6b
parent 5100a405dc6abe7f28597248b3dea415c2089d4a

Issue #12175: RawIOBase.readall() now returns None if read() returns None.

Lib/_pyio.py

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index dc68d04..76a2d5f 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -560,7 +560,11 @@
             if not data:
                 break
             res += data
-        return bytes(res)
+        if res:
+            return bytes(res)
+        else:
+            # b'' or None
+            return data
 
     def readinto(self, b):
         """Read up to len(b) bytes into b.