Restore Python 2.1 compatibility (os.extsep was introduced in Python 2.2).

diff --git a/Lib/distutils/command/install_lib.py b/Lib/distutils/command/install_lib.py
index 22d0ab37a7570cb6eeaef7ed728d793ff4c769eb..08ff543449c04c773108c875601415b3f5755ac4 100644 (file)
--- a/Lib/distutils/command/install_lib.py
+++ b/Lib/distutils/command/install_lib.py
@@ -9,8 +9,10 @@ from distutils.errors import DistutilsOptionError
 
 
 # Extension for Python source files.
-PYTHON_SOURCE_EXTENSION = os.extsep + "py"
-
+if hasattr(os, 'extsep'):
+    PYTHON_SOURCE_EXTENSION = os.extsep + "py"
+else:
+    PYTHON_SOURCE_EXTENSION = ".py"
 
 class install_lib (Command):