def get_iterator(self, data, axis=<NUM_LIT:0>):
splitter = self._get_splitter(data, axis=axis)<EOL>keys = self._get_group_keys()<EOL>for key, (i, group) in zip(keys, splitter):<EOL><INDENT>yield key, group<EOL><DEDENT>
Groupby iterator

Returns
-------
Generator yielding sequence of (name, subsetted object)
for each group