From: Ben Darnell <ben@bendarnell.com>
Date: Sat, 26 Oct 2013 22:27:25 +0000 (-0400)
Subject: Check for the existence of sys.stderr.isatty before calling it.
X-Git-Tag: v3.2.0b1~70
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=689d9c8e9a48e4695a8b172ff5b02a6ba41fd7cb;p=thirdparty%2Ftornado.git

Check for the existence of sys.stderr.isatty before calling it.

Only the `write` method is guaranteed to exist on sys.stderr and sys.stdout.

Closes #920.
---

diff --git a/tornado/log.py b/tornado/log.py
index fa11f3795..648db5c6c 100644
--- a/tornado/log.py
+++ b/tornado/log.py
@@ -51,7 +51,7 @@ gen_log = logging.getLogger("tornado.general")
 
 def _stderr_supports_color():
     color = False
-    if curses and sys.stderr.isatty():
+    if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty():
         try:
             curses.setupterm()
             if curses.tigetnum("colors") > 0: