Calling help on an invalid command generates an exception

[garside]

When you call " help some_undefined_command", it throws a KeyError. I've found a work around from another part of the code. The patch I'm using is:

--- subcommand.py 2010-10-05 19:14:23.000000000 -0400
+++ other.py 2010-10-05 19:15:27.000000000 -0400
@@ -209,7 +209,11 @@
"""
if cmds:
for cmd in cmds:

•       subcommand_lookup[cmd].showhelp()
  

•       if cmd in subcommand_lookup:
  

•           subcommand_lookup[cmd].showhelp()
  

•       else:
  

•           print >> sys.stderr, "Unknown command:", cmd
  

•           print >> sys.stderr, "Type '%s help' for usage." % prog.name
  

  else:
  print "usage: %s [options] [args]" % prog.name
  print