code: def list_proxy(root_package = 'vlcp'):
      '''
      Walk through all the sub modules, find subclasses of vlcp.server.module._ProxyModule,
      list their default values
      '''
      proxy_dict = OrderedDict()
      pkg = __import__(root_package, fromlist=['_'])
      for imp, module, _ in walk_packages(pkg.__path__, root_package + '.'):
          m = __import__(module, fromlist = ['_'])
          for _, v in vars(m).items():
              if v is not None and isinstance(v, type) and issubclass(v, _ProxyModule) \
                      and v is not _ProxyModule \
                      and v.__module__ == module \
                      and hasattr(v, '_default'):
                  name = v.__name__.lower()
                  if name not in proxy_dict:
                      proxy_dict[name] = {'defaultmodule': v._default.__name__.lower(),
                                          'class': repr(v._default.__module__ + '.' + v._default.__name__)}
      return proxy_dicf list_proxy(root_package = 'vlcp'):
      '''
      Walk through all the sub modules, find subclasses of vlcp.server.module._ProxyModule,
      list their default values
      '''
      proxy_dict = OrderedDict()
      pkg = __import__(root_package, fromlist=['_'])
      for imp, module, _ in walk_packages(pkg.__path__, root_package + '.'):
          m = __import__(module, fromlist = ['_'])
          for _, v in vars(m).items():
              if v is not None and isinstance(v, type) and issubclass(v, _ProxyModule) \
                      and v is not _ProxyModule \
                      and v.__module__ == module \
                      and hasattr(v, '_default'):
                  name = v.__name__.lower()
                  if name not in proxy_dict:
                      proxy_dict[name] = {'defaultmodule': v._default.__name__.lower(),
                                          'class': repr(v._default.__module__ + '.' + v._default.__name__)}
      return proxy_dict
docs: Walk through all the sub modules, find subclasses of vlcp.server.module._ProxyModule,
      list their default values