code: def render(self, *args, **kwargs):
          
          vars = dict(*args, **kwargs)
          try:
              return concat(self.root_render_func(self.new_context(vars)))
          except:
              exc_info = sys.exc_info()
          return self.environment.handle_exception(exc_info, True)
docs: This method accepts the same arguments as the `dict` constructor:
          A dict, a dict subclass or some keyword arguments.  If no arguments
          are given the context will be empty.  These two calls do the same::
  
              template.render(knights='that say nih')
              template.render({'knights': 'that say nih'})
  
          This will return the rendered template as unicode string.