code: def view_help(self):
          
          def format_desc(desc):
              return "%s (Type: %s, Default: %s)\n%s" % (
                      desc.name,
                      desc.validator.__name__.replace('validate_', ''),
                      desc.default,
                      desc.help or '')
  
          def format_namespace(key, desc_list):
              return "\nNamespace: %s\n%s" % (
                      key,
                      '\n'.join(sorted(format_desc(desc) for desc in desc_list)))
  
          def namespace_cmp(item):
              name, _ = item
              return chr(0) if name == DEFAULT else name
  
          return '\n'.join(format_namespace(*desc) for desc in
                           sorted(six.iteritems(self.descriptions),
                                  key=namespace_cmp))
docs: Return a help message describing all the statically configured keys.