parameters: (self, *args, **kwargs)
return_statement: return ExpandingGroupby(
              self._selected_obj,
              *args,
              _grouper=self.grouper,
              **kwargs,
          )
docstring: Return an expanding grouper, providing expanding
          functionality per group.
docstring_summary: Return an expanding grouper, providing expanding
          functionality per group.
docstring_tokens: Return an expanding grouper providing expanding functionality per group .
function: def expanding(self, *args, **kwargs):
          """
          Return an expanding grouper, providing expanding
          functionality per group.
          """
          from pandas.core.window import ExpandingGroupby
  
          return ExpandingGroupby(
              self._selected_obj,
              *args,
              _grouper=self.grouper,
              **kwargs,
          )
function_tokens: def expanding ( self , * args , * * kwargs ) : from pandas . core . window import ExpandingGroupby return ExpandingGroupby ( self . _selected_obj , * args , _grouper = self . grouper , * * kwargs , )