Использование Pydantic сегодня стало нормой, и это правильно. Но иногда на ревью вижу, что используют его не всегда корректно.
Например, метод BaseModel.model_dump() по умолчанию не преобразует стандартные типы, такие как datetime, UUID или Decimal, в простой сериализуемый для JSON вид. Тогда пишут кастмоный сериализатор для этих типов чтобы функция json.dump() не падала с ошибкой.
import uuid
from datetime import datetime
from decimal import Decimal
from uuid import UUID
from pydantic import BaseModel
class MyModel(BaseModel):
id: UUID
date: datetime
value: Decimal
obj = MyModel(
id=uuid.uuid4(),
date=datetime.now(),
value='1.23'
)
print(obj.model_dump())
# не подходит для json.dump
# {
# 'id': UUID('4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1'),
# 'date': datetime.datetime(2025, 12, 12, 12, 12, 12, 111111),
# 'value': Decimal('1.23')
# }
# добавляем свой кастомный сериализатор
json.dumps(obj.model_dump(), cls=MySerializer)
# {
# 'id': '4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1',
# 'date': '2025-12-12T12:12:12.111111',
# 'value': '1.23'
# }
В данном случае класс MySerializer обрабатывает datetime, UUID и Decimal. Например так:
class MySerializer(json.JSONEncoder):
def default(self, o):
if isinstance(o, Decimal):
return str(o)
elif isinstance(o, datetime):
return o.isoformat()
elif isinstance(o, UUID):
return str(o)
return super().default(o)
Специально для тех, кто всё еще так делает - в этом нет необходимости!
Pydantic может это сделать сам, просто нужно добавить параметр mode="json".
json.dumps(obj.model_dump(mode="json"))
# {
# 'id': '4f8c1bc4-25fd-40cd-9dbe-2c73639b0dc1',
# 'date': '2012-12-12T12:12:12.111111',
# 'value': '1.23'
# }
#pydantic#libs
#Musical chair
Activity for review vocabulary
Class 7️⃣"Active"
Students learned vocabulary Time⏰
On each chair stuck the words from the topic time
When music🎶 plays students walking around the chairs and dance 🕺💃
When music pauses they should sit and say the word with its meaning
The challenge is that students' numbers are more than chairs. And also if students can not say the meaning they can not participate in the activity anymore
Aim of the activity
Review vocabulary
Enhance vocabulary ⬆️
Motivate students to learn foreign language
Relaxation 😂
Work on concentration🤔
Energizer😉
Learning should be
Easy and Enjoyable 😎👍
Teacher Umida Pulatova
Kushtepa district Specialized School
Fergana Region
https://t.me/LanguageStuff
🎬 Whiplash: Em Busca da Perfeição (2014)
Gênero: #Drama, #Musical
⭐️ IMDb: 8.5
⏳ Duração: 1 h 46 min
📝 Sinopse:
Um jovem e promissor baterista se matricula em um conservatório de música onde seus sonhos são guiados por um instrutor que não pára por nada para perceber o potencial de um aluno.
Fonte: IMDb
🔵Inscreva-se em @Assistir
*Patrocinado: Anime Bot
📺- CHICA VAMPIRO -📺
Título original: Chica Vampiro
Género:#Fantasía#Musical
Temporadas: 1
Año: 2013 📼
Origen: Colombia 🇨🇴
Tráiler:youtu.be/tlNRg_fYFU4
Sinopsis:
Daisy O'Brian es una chica normal que sueña con una carrera como cantante en comedia musical. Sus padres son vampiros y, según la tradición familiar, debe decidir convertirse en vampiro o no en su cumpleaños número 16. Ese día, Daisy decide seguir siendo humana para vivir junto a su amor, Max, que es su vecino y compañero de clase.
Disponible:Netflix | Vix | HBO Max
@SeriesClubHD
🍿 Lady Gaga and Joaquin Phoenix unleash chaos in 'Joker: Folie à Deux'
📆Premiere: October 4, 2024
🎭Genre: #Drama · #Musical
🎬 The first trailer for 'Joker: Folie à Deux' is here! Joaquin Phoenix returns as Arthur Fleck, joined by Lady Gaga as Harley Quinn. This dynamic duo promises chaos and music in a sequel that takes place mostly in Arkham Asylum. 🌆🃏
The first film was a massive hit, winning the Golden Lion and multiple Oscars, including Best Actor for Phoenix. This time, in addition to the usual madness, we'll see unique musical elements that will surprise everyone. Don't miss it! 🎤💥