change posix to os; and change error message
diff --git a/Demo/scripts/from.py b/Demo/scripts/from.py
index 8e663f1..394af8d 100755
--- 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: