Python/ django | United States America (US)

Create: 2025-04-20 Update: 2025-07-02 18:00:09

🐍 Как просто создать мультисловарь (Multi-dictionary) в Python

Хочешь, чтобы один ключ в словаре указывал на несколько значений?

Легко!

Используй collections.defaultdict и встроенный list:


from collections import defaultdict

multidict = defaultdict(list)
multidict["SW"].append("Han Solo")
multidict["SW"].append("R2D2")

🔁 Теперь каждый ключ по умолчанию сопоставляется с пустым списком. А append добавляет новое значение в этот список.

Но будь внимателен: это немного “обман”. На самом деле словарь всё ещё отображает один ключ → одно значение. Просто это значение — список, в который ты уже сам кладёшь что угодно.

Почему defaultdict удобен?
Потому что тебе не нужно проверять, есть ли ключ в словаре. Пустой список будет создан автоматически при первом обращении к ключу.

@pythonl

Python/ django


from collections import defaultdict

multidict = defaultdict(list)
multidict["SW"].append("Han Solo")
multidict["SW"].append("R2D2")

hottg.com/pythonl/4768

6.8K viewsApr 20 at 13:17

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🐍 Как просто создать мультисловарь (Multi-dictionary) в Python

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