unique_justseen¶

class iteration_utilities.unique_justseen(iterable, key=None)¶

List unique elements, preserving order. Remember only the element just seen.

Parameters:

iterableiterable: Iterable to check.
keycallable or None, optional: If None the values are taken as they are. If it’s a callable the callable is applied to the value before comparing it. Default is None.

Returns:

iterablegenerator: An iterable containing all unique values just seen in the iterable.

Examples

>>> from iteration_utilities import unique_justseen
>>> list(unique_justseen('AAAABBBCCDAABBB'))
['A', 'B', 'C', 'D', 'A', 'B']

>>> list(unique_justseen('ABBCcAD', str.lower))
['A', 'B', 'C', 'A', 'D']