# selections (the pool) in a list or previous selections in a
# dictionary.
- # When the number of selections is small compared to the population,
- # then tracking selections is efficient, requiring only a small
- # dictionary and an occasional reselection. For a larger number of
- # selections, the pool tracking method is preferred since the list takes
- # less space than the dictionary and it doesn't suffer from frequent
- # reselections.
+ # When the number of selections is small compared to the
+ # population, then tracking selections is efficient, requiring
+ # only a small dictionary and an occasional reselection. For
+ # a larger number of selections, the pool tracking method is
+ # preferred since the list takes less space than the
+ # dictionary and it doesn't suffer from frequent reselections.
n = len(population)
if not 0 <= k <= n: