1 o 2 3 ��h� � @ s d Z dd� Zdd� ZdS )zIUtilities for working with data structures like lists, dicts and tuples. 4 c s t � � � fdd�| D �S )a/ uniq_stable(elems) -> list 5 6 Return from an iterable, a list of all the unique elements in the input, 7 but maintaining the order in which they first appear. 8 9 Note: All elements in the input must be hashable for this routine 10 to work, as it internally uses a set for efficiency reasons. 11 c s"