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impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/logging/SystemLogger.java

        this.threshold = Objects.requireNonNullElse(threshold, Level.INFO);
    }

    private PrintStream toPsOrDef(OutputStream outputStream, PrintStream def) {
        if (outputStream == null) {
            return def;
        }
        if (outputStream instanceof PrintStream ps) {
            return ps;
        }
        return new PrintStream(outputStream, true);
    }

    @Override

Created: Sun Apr 05 03:35:12 GMT 2026

- Last Modified: Sat Feb 08 16:25:25 GMT 2025

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github.com/tiangolo/fastapi

docs_src/strict_content_type/tutorial001_py310.py

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI(strict_content_type=False)


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


@app.post("/items/")
async def create_item(item: Item):

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Mon Feb 23 17:45:20 GMT 2026

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github.com/tiangolo/fastapi

docs_src/debugging/tutorial001_py310.py

import uvicorn
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def root():
    a = "a"
    b = "b" + a
    return {"hello world": b}


if __name__ == "__main__":

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

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github.com/tiangolo/fastapi

tests/test_router_circular_import.py

import pytest
from fastapi import APIRouter


def test_router_circular_import():
    router = APIRouter()

    with pytest.raises(
        AssertionError,
        match="Cannot include the same APIRouter instance into itself. Did you mean to include a different router?",
    ):

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Tue Feb 10 10:58:40 GMT 2026

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github.com/tiangolo/fastapi

docs_src/query_params/tutorial006_py310.py

from fastapi import FastAPI

app = FastAPI()


@app.get("/items/{item_id}")
async def read_user_item(
    item_id: str, needy: str, skip: int = 0, limit: int | None = None
):
    item = {"item_id": item_id, "needy": needy, "skip": skip, "limit": limit}

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Fri Jan 07 14:11:31 GMT 2022

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github.com/tiangolo/fastapi

docs/ja/docs/advanced/advanced-python-types.md

何らかの理由で `|` が使えない場合、たとえば型アノテーションではなく `response_model=` のような場所では、縦棒（`|`）の代わりに `typing` の `Union` を使えます。

例えば、`str` または `None` になり得ることを宣言できます:

```python
from typing import Union


def say_hi(name: Union[str, None]):
        print(f"Hi {name}!")
```

`typing` には、`None` を取り得ることを宣言するための短縮形として `Optional` もあります。

ここからは私のとても主観的な提案です:

- 🚨 `Optional[SomeType]` の使用は避けましょう

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Fri Feb 13 15:24:30 GMT 2026

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github.com/gradle/gradle

build-logic/binary-compatibility/src/test/groovy/gradlebuild/binarycompatibility/rules/AbstractContextAwareRuleSpecification.groovy

            userData[key] = value
        }
    }

    ClassPool instanceScopedPool = new ClassPool()

    JApiClass apiClass = Stub(JApiClass)

    def setup() {
        instanceScopedPool.appendSystemPath()
    }

    void noViolation(def rule) {
        assert rule.maybeViolation(apiClass) == null
    }

    Map getInitializationParams() {
        return [

Created: Wed Apr 01 11:36:16 GMT 2026

- Last Modified: Tue Dec 30 10:14:25 GMT 2025

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github.com/tiangolo/fastapi

docs_src/custom_response/tutorial002_py310.py

from fastapi import FastAPI
from fastapi.responses import HTMLResponse

app = FastAPI()


@app.get("/items/", response_class=HTMLResponse)
async def read_items():
    return """
    <html>
        <head>
            <title>Some HTML in here</title>
        </head>
        <body>
            <h1>Look ma! HTML!</h1>
        </body>
    </html>

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

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github.com/tiangolo/fastapi

docs_src/response_model/tutorial003_01_py310.py

app = FastAPI()


class BaseUser(BaseModel):
    username: str
    email: EmailStr
    full_name: str | None = None


class UserIn(BaseUser):
    password: str


@app.post("/user/")
async def create_user(user: UserIn) -> BaseUser:

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Sat Jan 07 13:45:48 GMT 2023

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github.com/tiangolo/fastapi

docs_src/settings/tutorial001_py310.py


class Settings(BaseSettings):
    app_name: str = "Awesome API"
    admin_email: str
    items_per_user: int = 50


settings = Settings()
app = FastAPI()


@app.get("/info")
async def info():
    return {
        "app_name": settings.app_name,
        "admin_email": settings.admin_email,
        "items_per_user": settings.items_per_user,

Created: Sun Apr 05 07:19:11 GMT 2026

- Last Modified: Thu Feb 12 13:19:43 GMT 2026

- 419 bytes

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