From: Christian Heimes <christian@cheimes.de>
Date: Fri, 15 Aug 2008 18:43:03 +0000 (+0000)
Subject: Removed some unused imports to decrease the amount of loaded modules during startup.
X-Git-Tag: v3.0b3~103
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=deb75f579b597d996734f66f93a2303bc7ac4fab;p=python

Removed some unused imports to decrease the amount of loaded modules during startup.
Added fallback to _dummy_thread for OSs w/o thread support.
---

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
diff --git a/Lib/warnings.py b/Lib/warnings.py
index bcd702c993..0be20e05e3 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -5,7 +5,6 @@
 # See bug 683658.
 import linecache
 import sys
-import types
 
 __all__ = ["warn", "showwarning", "formatwarning", "filterwarnings",
            "resetwarnings"]