}

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  /*
   * absent = ZERO isn't required, since unmodList.add() must
   * throw regardless, but it keeps the method name accurate.
   */
  public void testAdd_unsupportedPresent() {
    assertThrows(UnsupportedOperationException.class, () -> getList().add(e0()));
  }

  @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES})

## Call `uvicorn` { #call-uvicorn }

In your FastAPI application, import and run `uvicorn` directly:

{* ../../docs_src/debugging/tutorial001_py39.py hl[1,15] *}

### About `__name__ == "__main__"` { #about-name-main }

The main purpose of the `__name__ == "__main__"` is to have some code that is executed when your file is called with:

<div class="termy">

```console
$ python myapp.py
```

</div>

    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  /**
   * Returns {@link Method} instances for the tests that assume that the inverse will be the same
   * after serialization.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getInverseSameAfterSerializingMethods() {

from typing import Annotated, Union

import pytest
from fastapi import FastAPI
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel


@pytest.fixture(name="client")
def client_fixture() -> TestClient:
    from fastapi import Body
    from pydantic import Discriminator, Tag

    class Cat(BaseModel):
        pet_type: str = "cat"
        meows: int

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-impl-modules</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-core</artifactId>

  <name>Maven 4 Core</name>
  <description>Maven Core classes.</description>

  <dependencies>
    <!--  Maven4 API -->
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-annotations</artifactId>

我们从一个 `HeroBase` 模型开始，该模型具有所有模型**共享的字段**：

* `name`
* `age`

{* ../../docs_src/sql_databases/tutorial002_an_py310.py ln[7:9] hl[7:9] *}

#### `Hero` - *表模型*

接下来，我们创建 `Hero` ，实际的*表模型*，并添加那些不总是在其他模型中的**额外字段**：

* `id`
* `secret_name`

因为 `Hero` 继承自 HeroBase ，所以它**也**包含了在 `HeroBase` 中声明过的**字段**。因此 `Hero` 的所有字段为：

* `id`
* `name`
* `age`
* `secret_name`

   *
   * TODO(cpovirk): Could this be simplified if we modified implementations of LegacyConverter to
   * override methods (probably called "unsafeDoForward" and "unsafeDoBackward") with the same
   * signatures as the methods below, rather than overriding the same doForward and doBackward
   * methods as implementations of normal converters do?
   *
   * But no matter what we do, it's worth remembering that the resulting code is going to be unsound

        // When - write multiple times
        for (int i = 0; i < 10; i++) {
            request.writeBytesWireFormat(buffer, i * 10);
        }

        // Then - all should have same structure size
        for (int i = 0; i < 10; i++) {
            assertEquals(4, SMBUtil.readInt2(buffer, i * 10));
        }
    }

    @Test

        SMBUtil.writeInt2(0, buffer, 2);

        // When - simulate multiple concurrent reads on same response object
        int read1 = response.readBytesWireFormat(buffer, 0);
        int read2 = response.readBytesWireFormat(buffer, 0);
        int read3 = response.readBytesWireFormat(buffer, 0);

        // Then - all reads should return same result
        assertEquals(4, read1);
        assertEquals(4, read2);

Zum Beispiel könnten Sie eine Datei `main.py` haben mit:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Tipp