### 現代 Python

這一切都基於標準的 **Python 型別**宣告（感謝 Pydantic）。無需學習新的語法，只需使用標準的現代 Python。

如果你需要 2 分鐘來學習如何使用 Python 型別（即使你不使用 FastAPI），可以看看這個簡短的教學：[Python 型別](python-types.md){.internal-link target=_blank}。

如果你寫帶有 Python 型別的程式碼：

```python
from datetime import date

from pydantic import BaseModel

# 宣告一個變數為 string
# 並在函式中獲得 editor support
def main(user_id: str):

    }
  }

  /**
   * Returns an unmodifiable view of the specified table. This method allows modules to provide
   * users with "read-only" access to internal tables. Query operations on the returned table "read
   * through" to the specified table, and attempts to modify the returned table, whether direct or
   * via its collection views, result in an {@code UnsupportedOperationException}.

Эта команда создаст или изменит некоторые [переменные окружения](environment-variables.md){.internal-link target=_blank}, которые будут доступны для следующих команд.

Одна из таких переменных — `PATH`.

/// tip | Подсказка

Вы можете узнать больше о переменной окружения `PATH` в разделе [Переменные окружения](environment-variables.md#path-environment-variable){.internal-link target=_blank}.

///

package rsa // This file implements the RSASSA-PSS signature scheme and the RSAES-OAEP // encryption scheme according to RFC 8017, aka PKCS #1 v2.2. import ( "bytes" "crypto/internal/fips140" "crypto/internal/fips140/drbg" "crypto/internal/fips140/sha256" "crypto/internal/fips140/sha3" "crypto/internal/fips140/sha512" "crypto/internal/fips140/subtle" "errors" "io" ) // Per RFC 8017, Section 9.1 // // EM = MGF1 xor DB || H( 8*0x00 || mHash || salt ) || 0xbc // // where // // DB = PS || 0x01 || salt //...

///

O **FastAPI** é todo baseado em Pydantic.

Você verá muito mais disso na prática no [Tutorial - Guia do usuário](tutorial/index.md){.internal-link target=_blank}.

/// tip | Dica

```
https://mysuperapp.com/items/
```

/// tip | Consejo

Si quieres aprender más sobre HTTPS, revisa la guía [Acerca de HTTPS](../deployment/https.md){.internal-link target=_blank}.

///

### Cómo funcionan los headers reenviados por el Proxy { #how-proxy-forwarded-headers-work }

///

**FastAPI** está completamente basado en Pydantic.

Verás mucho más de todo esto en práctica en el [Tutorial - Guía del Usuario](tutorial/index.md){.internal-link target=_blank}.

/// tip | Consejo

例如，您可以创建一个名为 `config.py` 的文件，其中包含以下内容：

{* ../../docs_src/settings/app01/config.py *}

然后在一个名为 `main.py` 的文件中使用它：

{* ../../docs_src/settings/app01/main.py hl[3,11:13] *}

/// tip

您还需要一个名为 `__init__.py` 的文件，就像您在[Bigger Applications - Multiple Files](../tutorial/bigger-applications.md){.internal-link target=_blank}中看到的那样。

///

github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0.51.0 h1:OqVGm6Ei3x5+yZmSJG1Mh2NwHvpVmZ08CB5qJhT9Nuk=
github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0.51.0/go.mod h1:SZiPHWGOOk3bl8tkevxkoiwPgsIl6CwrWcbwjfHZpdM=
github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.51.0 h1:6/0iUd0xrnX7qt+mLNRwg5c0PGv8wpE8K90ryANQwMI=

                        buf.append(content).append(' ');
                    } catch (final Exception e) {
                        if (logger.isDebugEnabled()) {
                            logger.debug("Exception in an internal extractor.", e);
                        }
                    }
                }
            }
        } catch (final MessagingException e) {
            if (logger.isDebugEnabled()) {