From deb75f579b597d996734f66f93a2303bc7ac4fab Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@cheimes.de>
Date: Fri, 15 Aug 2008 18:43:03 +0000
Subject: Removed some unused imports to decrease the amount of loaded modules
 during startup. Added fallback to _dummy_thread for OSs w/o thread support.

---
 Lib/io.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'Lib/io.py')

diff --git a/Lib/io.py b/Lib/io.py
index 18680cad53..4fe1e8cb68 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -60,8 +60,12 @@ import abc
 import sys
 import codecs
 import _fileio
-import warnings
-from _thread import allocate_lock as Lock
+# Import _thread instead of threading to reduce startup cost
+try:
+    from _thread import allocate_lock as Lock
+except ImportError:
+    from _dummy_thread import allocate_lock as Lock
+
 
 # open() uses st_blksize whenever we can
 DEFAULT_BUFFER_SIZE = 8 * 1024  # bytes
-- 
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