Приклад шаблону проектування. Об'єктний пул мовою програмування Python.
"""
Offer a significant performance boost; it is most effective in
situations where the cost of initializing a class instance is high, the
rate of instantiation of a class is high, and the number of
instantiations in use at any one time is low.
"""
class ReusablePool:
"""
Manage Reusable objects for use by Client objects.
"""
def __init__(self, size):
self._reusables = [Reusable() for _ in range(size)]
def acquire(self):
return self._reusables.pop()
def release(self, reusable):
self._reusables.append(reusable)
class Reusable:
"""
Collaborate with other objects for a limited amount of time, then
they are no longer needed for that collaboration.
"""
pass
def main():
reusable_pool = ReusablePool(10)
reusable = reusable_pool.acquire()
reusable_pool.release(reusable)
if __name__ == "__main__":
main()
