code: def show_help(self):
          
          output = [
              'Usage %s subcommand [options] [args]' % self.prog_name,
              '',
              'Available commands:',
              '',
          ]
          for cmd in self.get_commands():
              output.append('  %s' % cmd)
          output += ['', '']
          self.stdout.write(u'\n'.join(output))
docs: Prints help text about available commands.