Add separator
diff --git a/Lib/os.py b/Lib/os.py
index 4212232..af0ce89 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -6,6 +6,7 @@
# - os.name is either 'posix' or 'mac'
# - os.curdir is a string representing the current directory ('.' or ':')
# - os.pardir is a string representing the parent directory ('..' or '::')
+# - os.sep is the (or a most common) pathname separator ('/' or ':')
# Programs that import and use 'os' stand a better chance of being
# portable between different platforms. Of course, they must then
@@ -20,6 +21,7 @@
name = 'posix'
curdir = '.'
pardir = '..'
+ sep = '/'
import posixpath
path = posixpath
del posixpath
@@ -28,6 +30,7 @@
name = 'mac'
curdir = ':'
pardir = '::'
+ sep = ':'
import macpath
path = macpath
del macpath