Fixed to use new Python features and use more commonly accepted style

Reindented

Demo/scripts/from.py

@@ -15,21 +15,21 @@ except (AttributeError, KeyError):
     sys.exit(2)
 
 try:
-	mail = open(mailbox, 'r')
+    mail = open(mailbox)
 except IOError:
-	sys.stderr.write('Cannot open mailbox file: ' + mailbox + '\n')
-	sys.exit(2)
+    sys.exit('Cannot open mailbox file: ' + mailbox)
 
 while 1:
     line = mail.readline()
-	if not line: break # EOF
-	if line[:5] == 'From ':
+    if not line:
+        break # EOF
+    if line.startswith('From '):
         # Start of message found
         print line[:-1],
         while 1:
             line = mail.readline()
-			if not line: break # EOF
-			if line == '\n': break # Blank line ends headers
-			if line[:8] == 'Subject:':
+            if not line or line == '\n':
+                break
+            if line.startswith('Subject: '):
                 print `line[9:-1]`,
         print