Python on OS X 10.3 and above now uses dlopen() (via dynload_shlib.c)

to load extension modules and now provides the dl module. As a result,
sys.setdlopenflags() now works correctly on these systems. (SF patch
#1454844)

Lib/test/test_dl.py

@@ -10,6 +10,7 @@ sharedlibs = [
     ('/usr/lib/libc.so', 'getpid'),
     ('/lib/libc.so.6', 'getpid'),
     ('/usr/bin/cygwin1.dll', 'getpid'),
+    ('/usr/lib/libc.dylib', 'getpid'),
     ]
 
 for s, func in sharedlibs: