Method copy

qlib/contrib/data/utils/sepdf.py:79–80

(self, *args, **kwargs)

        return self.apply_each("sort_index", True, *args, **kwargs)

    def copy(self, *args, **kwargs):
        return self.apply_each("copy", True, *args, **kwargs)

    def _update_join(self):
        if self.join not in self: