commit 8053d89f7b3d26d4c113261dc9e3f58e7dd57eb9
author Guido van Rossum <guido@python.org> Mon Apr 06 14:45:26 1998 +0000
committer Guido van Rossum <guido@python.org> Mon Apr 06 14:45:26 1998 +0000
tree 7824b8166a8bc3227e74fe123a556a965aa1020f
parent f4b44fa6ef9ce6f4d4aa5e845de57858e8a97f8b

Add usage message when no arguments.

Lib/tabnanny.py

diff --git a/Lib/tabnanny.py b/Lib/tabnanny.py
index 9af8ecb..b290fb6 100755
--- a/Lib/tabnanny.py
+++ b/Lib/tabnanny.py
@@ -19,9 +19,13 @@
         opts, args = getopt.getopt(sys.argv[1:], "v")
     except getopt.error, msg:
         print msg
+        return
     for o, a in opts:
         if o == '-v':
             verbose = verbose + 1
+    if not args:
+        print "Usage:", sys.argv[0], "file_or_directory ..."
+        return
     for arg in args:
         check(arg)