Pydantic? Python? ??? ?? ? ?? ?? ????????. Python ?? ??? ???? ???? ???? ???? ?? ???? ??? ???? ????? ??? ??? ???? ????? ?????. Python? ??? ???? ??? ?? ??? ?????? Pydantic? ??? ???? ?? ???? ?? ???? ??? Python ???? ???? ???? ???? ???/????? ? ?? ????. ?? ??? ???????:

??? ??

Python? ?? ??? ???? ???? ?? ?? ???? ???? ?????.

from pydantic import BaseModel, ValidationError

class User(BaseModel):
    id: int
    name: str
    email: str

# Valid input
user = User(id=1, name="John Doe", email="john@example.com")
print(user)

# Invalid input
try:
    user = User(id="not-an-integer", name="Jane", email="jane@example.com")
except ValidationError as err:
    print(err)

??? ??? ???? ?? ??? pydantic.BaseModel? ?????!

?? ??

Pydantic? ??? ???? ??? ??? ??? ??? ??? ? ?? ??? ??? ?????. ?? @validate_call ?????? ???? ???? ?? ?? ? ?? ?? ?? ??? ??? ??? ??? ??? ? ????. ??? ?? ?? ?? ??? ?? ??? ???? ??? ValidationError? ?????.

from pydantic import validate_call

@validate_call
def greet(name: str, age: int) -> str:
    return f"Hello {name}, you are {age} years old."

# Valid input
print(greet("Alice", 30))  # Output: Hello Alice, you are 30 years old.

# Invalid input
try:
    greet("Bob", "not-a-number")
except Exception as e:
    print(e)

@validate_call?? verify_return ???? ??????? Pydantic? ??? ?? ?? ??? ?? ??? ?? ?? ?????. ??? ?? ??? ???? ?? ???? ???? ???.

from pydantic import validate_call

@validate_call(validate_return=True)
def calculate_square(number: int) -> int:
    return number ** 2  # Correct return type

# Valid input and return
print(calculate_square(4))  # Output: 16

# Invalid return value
@validate_call(validate_return=True)
def broken_square(number: int) -> int:
    return str(number ** 2)  # Incorrect return type

try:
    broken_square(4)
except Exception as e:
    print(e)

??

Pydantic? JSON ???? ??? ??? ?? ??? ?? ??? ?? ??? ? ????.

from pydantic import BaseModel
from typing import List

class Item(BaseModel):
    name: str
    price: float

class Order(BaseModel):
    items: List[Item]
    total: float

# JSON-like data
data = {
    "items": [
        {"name": "Apple", "price": 1.2},
        {"name": "Banana", "price": 0.8}
    ],
    "total": 2.0
}

order = Order(**data) 
print(order) # items=[Item(name='Apple', price=1.2), Item(name='Banana', price=0.8)] total=2.0

??? ? ????

Pydantic ??? JSON?? ???? ????? ?? ???? ? ????.

from pydantic import BaseModel

class User(BaseModel):
    id: int
    name: str
    email: str

# Create a model instance
user = User(id=1, name="Alice", email="alice@example.com")

# Serialize to dictionary and JSON
user_dict = user.model_dump()
user_json = user.model_dump(mode='json')

print("Dictionary:", user_dict)
print("JSON:", user_json)

# Deserialize back to the model
new_user = User.model_validate(user_json)
print("Parsed User:", new_user)

??? ??

??? ??? ??? ??? ????. ?? ?? ?? int, bool ? datetime ??? id, Due_date ? ???? ??? ???? ??? ???? ?? ??? ??? ? ????.

• ID? ?? ???
• ISO-8601, UTC ?? ?? ?? ??? ???(??_??)
• '?'/'???', '??'/'??', '?'/'??', 1/0 ? ????

from sensei import APIModel
from datetime import datetime


class Task(APIModel):
    id: int
    due_date: datetime
    priority: bool


task = Task(due_date='2024-10-15T15:30:00',>



<p>The result will be<br>
</p>

<pre class="brush:php;toolbar:false">Task(id=1, due_date=datetime.datetime(2024, 10, 15, 15, 30), priority=True)

??? ??

???? ???? ??? ??? ?? ?? ??? ??? ?? ????. ?? ?? ???? ?? ?? ??? ???? ?? ??? ? ?? ?? ??? ??? ?? ??? ??? ? ????. ??? ???? field_validator ????? ?? Field ??? ?? ?????. ?? ??? ?? ??? field_validator? ???? ?? ??? ? ??? ???? ???? ????? '*'? ???? ?? ??? ??? ???? ??? ? ????.

import Any ????
pydantic import Field, field_validator, EmailStr, BaseModel??

??? ???(BaseModel):
    ???: ??
    ??? ??: str = Field(pattern=r'^w $')
    ???: EmailStr
    age: int = Field(18, ge=14)
    is_active: ?? = ?
    ??: ??[str]

    # ?? ?? ?? '??' ???? ??? ???? ?????.
    @field_validator('??', ??='??')
    def _validate_roles(cls, ?: ??):
        return value.split(',') if isinstance(value, str) else value

user = ???(id=1, ??? ??='john', ???='john@example.com', ??='??,??')
??(???) #>



<h2>
  
  
  ?? ?? ????
</h2>

<p>Pydantic? ???? ?? ???? ????? ?? ????. ? ? ??? ??? ???????.</p>

<h3>
  
  
  FastAPI
</h3>

<p>Pydantic? ?? ?? ?? ?? ?? ? ??? Python?? API? ???? ?? ?? ? ?????? FastAPI???. FastAPI? ?? ?? ??, ?? ???? ? ?? ???? ?? Pydantic ??? ????? ?????.</p>

• ??: https://github.com/fastapi/fastapi
• ??: https://fastapi.tiangolo.com

???

FastAPI? API ????? ??? ?? Sensei? ??? API? ??? ?? ????? ???????. Sensei? ???? API ?????? ???? ?? ??? ??? ?? ????? ??? ???? ??? ?????.

• ??: https://github.com/CrocoFactory/sensei
• ??: https://sensei.crocofactory.dev

SQLModel ? Typer

SQLModel? Typer? FastAPI? ???? Sebastián Ramírez? ??? ? ?? ????? ???????.

SQLModel? Python ???????? ?????? ?? ??? ?????? ??? ????????. SQLAlchemy ? Pydantic? ???? ??? SQLModel? ORM? ??? ??? ??? ?? ? ???? ???? ?????.

• ??: https://github.com/fastapi/sqlmodel
• ??: https://sqlmodel.tiangolo.com

Typer? Python? ???? ??? ?????(CLI) ??????? ??? ?? ????????. Python? ?? ??? ???? ????? ??? CLI ??? ??? ???? ???? ?????? ????? ??????.

• ??: https://github.com/fastapi/typer
• ??: https://typer.tiangolo.com

? ??? Pydantic: ?? ??? ?! ?? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!