(mapping, iterable)
Tally elements from the iterable.
Tally elements from the iterable.
Tally elements from the iterable .
def _count_elements(mapping, iterable):
    'Tally elements from the iterable.'
    mapping_get = mapping.get
    for elem in iterable:
        mapping[elem] = mapping_get(elem, 0) + 1
def _count_elements ( mapping , iterable ) : mapping_get = mapping . get for elem in iterable : mapping [ elem ] = mapping_get ( elem , 0 ) + 1