Better argparse help

1 files changed, 13 insertions, 11 deletions

diff --git a/rencon b/rencon
index f36bba1..c9e4806 100755
--- a/rencon
+++ b/rencon
@@ -1,27 +1,29 @@
 #!/usr/bin/env python
 
+import argparse
+import hashlib
 import os
 import sys
 from string import Template
-import argparse
-import hashlib
 
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description='Rename files based on content.')
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(
+        description="Rename files based on their content.",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 
     parser.add_argument('files', metavar='FILE', type=str, nargs='+',
-                        help='Files to rename')
+                        help="files to rename")
     parser.add_argument('-m', '--mask', nargs='?',
-                        help='File destination mask', default='${hash}.${ext}')
+                        help="file destination mask", default='${hash}.${ext}')
     parser.add_argument('-p', '--pretend', action='store_true',
-                        help='Do not rename, just print')
+                        help="do not rename, just print")
 
     args = parser.parse_args()
-    print 'Renaming with mask: %s' % args.mask
+    print "Renaming with mask: %s" % args.mask
     mask = Template(args.mask)
     for f in args.files:
         if not os.path.exists(f):
-            print >>sys.stderr, 'File %s does not exists.' % f
+            print >>sys.stderr, "File %s does not exists." % f
         else:
             with open(f) as fp:
                 h = hashlib.sha1(fp.read()).hexdigest()
@@ -29,10 +31,10 @@ if __name__ == "__main__":
             name = mask.substitute(hash=h, ext=ext)
             dest = os.path.join(os.path.dirname(f), name)
             if os.path.basename(f) == name:
-                print 'OK %s' % name
+                print "OK %s" % name
             else:
                 print "`%s' -> `%s'" % (f, dest)
                 if os.path.exists(dest):
-                    print >>sys.stderr, 'Destination %s already exists.' % dest
+                    print >>sys.stderr, "Destination %s already exists." % dest
                 elif not args.pretend:
                     os.rename(f, dest)