В Python сортировка по умолчанию является стабильной

Библиотека Python разработчика | Книги по питону

В Python сортировка по умолчанию является стабильной, то есть сохраняет порядок равных элементов:


a = [2, -1, 0, 1, -2]
sorted(a, key=lambda x: x**2)
# [0, -1, 1, 2, -2]

Функции max и min тоже стараются быть согласованными с поведением sorted.
max работает аналогично sorted(a, reverse=True)[0], а min — как sorted(a)[0].
Это означает, что обе функции возвращают самый левый возможный результат:


max([2, -2], key=lambda x: x**2)
# 2

max([-2, 2], key=lambda x: x**2)
# -2

min([2, -2], key=lambda x: x**2)
# 2

min([-2, 2], key=lambda x: x**2)
# -2

👉@BookPython

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Create: 2025-05-20
Last Update: 2025-06-15 20:50:16

В Python сортировка по умолчанию является стабильной, то есть сохраняет порядок равных элементов:


a = [2, -1, 0, 1, -2]
sorted(a, key=lambda x: x**2)
# [0, -1, 1, 2, -2]


max([2, -2], key=lambda x: x**2)
# 2

max([-2, 2], key=lambda x: x**2)
# -2

min([2, -2], key=lambda x: x**2)
# 2

min([-2, 2], key=lambda x: x**2)
# -2

👉@BookPython

BY Библиотека Python разработчика | Книги по питону

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