change posix to os; and change error message

diff --git a/Demo/scripts/from.py b/Demo/scripts/from.py
index 8e663f16e158c9794abd96606080826981e789c6..394af8df227541f7fd42bb464f98c5d7cf39e0d5 100755 (executable)
--- a/Demo/scripts/from.py
+++ b/Demo/scripts/from.py
@@ -4,15 +4,14 @@
 # Extension to multiple mailboxes and other bells & whistles are left
 # as exercises for the reader.
 
-import sys, posix
+import sys, os
 
 # Open mailbox file.  Exits with exception when this fails.
 
 try:
-       mailbox = posix.environ['MAIL']
-except RuntimeError:
-       sys.stderr.write \
-               ('Please set environment variable MAIL to your mailbox\n')
+       mailbox = os.environ['MAIL']
+except (AttributeError, KeyError):
+       sys.stderr.write('No environment variable $MAIL\n')
        sys.exit(2)
 
 try: