From: Amaury Forgeot d'Arc <amauryfa@gmail.com>
Date: Tue, 9 Jun 2009 22:53:16 +0000 (+0000)
Subject: Avoid invoking the parser/compiler just to test the presence of a function.
X-Git-Tag: v2.7a1~994
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=03dcc73c1121ebccc49af4cb5ff2d4aa8ca833db;p=thirdparty%2FPython%2Fcpython.git

Avoid invoking the parser/compiler just to test the presence of a function.
---

diff --git a/Lib/os.py b/Lib/os.py
index abbadc41e44b..40d117e824f7 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -514,11 +514,7 @@ def getenv(key, default=None):
 __all__.append("getenv")
 
 def _exists(name):
-    try:
-        eval(name)
-        return True
-    except NameError:
-        return False
+    return name in globals()
 
 # Supply spawn*() (probably only for Unix)
 if _exists("fork") and not _exists("spawnv") and _exists("execv"):