Function unique

pattern/text/search.py:107–111

Returns a list copy in which each item occurs only once (in-order).

(iterable)

# so we need to find all possible variations of a pattern.

def unique(iterable):
    """ Returns a list copy in which each item occurs only once (in-order).
    """
    seen = set()
    return [x for x in iterable if x not in seen and not seen.add(x)]

def find(function, iterable):
    """ Returns the first item in the list for which function(item) is True, None otherwise.