It also comes included when you install the `all` extras with:

<div class="termy">

```console
$ pip install "fastapi[all]"
---> 100%
```

</div>

### Create the `Settings` object { #create-the-settings-object }

Import `BaseSettings` from Pydantic and create a sub-class, very much like with a Pydantic model.

The same way as with Pydantic models, you declare class attributes with type annotations, and possibly default values.

## [Responses](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-response/)

The response answers the request with a code (like 200 for success or 404 for not found), headers, and its own optional body.

## Rewriting Requests

When you provide OkHttp with an HTTP request, you’re describing the request at a high-level: _“fetch me this URL with these headers.”_ For correctness and efficiency, OkHttp rewrites your request before transmitting it.

    }

    public void test_getDirectiveWithNull() {
        // Test getDirective with null user agent
        RobotsTxt robotsTxt = new RobotsTxt();

        Directive retrieved = robotsTxt.getDirective(null);
        assertNull(retrieved);
    }

    public void test_getMatchedDirectiveWithExactMatch() {
        // Test getMatchedDirective with exact match
        RobotsTxt robotsTxt = new RobotsTxt();

* The same with `app/routers/users.py`, it's another submodule: `app.routers.users`.
* There's also a subdirectory `app/internal/` with another file `__init__.py`, so it's another "Python subpackage": `app.internal`.
* And the file `app/internal/admin.py` is another submodule: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

The same file structure with comments:

```
.

    assert data["context_a"] == "started a"
    assert state["context_b"] == "finished b with a: started a"
    assert state["context_a"] == "finished a"


def test_context_b_raise():
    with pytest.raises(OtherDependencyError):
        client.get("/context_b_raise")
    assert state["context_b"] == "finished b with a: started a"
    assert state["context_a"] == "finished a"


def test_background_tasks():

    steps:
      - uses: actions/checkout@v6
      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.11"
      - name: Setup uv
        uses: astral-sh/setup-uv@v7
        with:
          version: "0.4.15"
          enable-cache: true
          cache-dependency-glob: |
            requirements**.txt
            pyproject.toml

            assertEquals(inputValue & 0xFF, ndrShort.value, "Constructor should mask value with 0xFF");
        }

        @Test
        @DisplayName("Should handle zero value correctly")
        void testConstructorZero() {
            // Given/When: Creating NdrShort with zero
            NdrShort ndrShort = new NdrShort(0);

            // Then: Value should be zero

    private NameServiceClientImpl nameServiceClient;

    @BeforeEach
    void setUp() throws UnknownHostException {
        // Configure mock context with fast timeouts
        when(mockContext.getConfig()).thenReturn(mockConfig);

        // Setup configuration with minimal timeouts for fast testing
        when(mockConfig.getNetbiosSoTimeout()).thenReturn(100); // Very short timeout

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,