```Python hl_lines="6  11"
{!../../../docs_src/path_params/tutorial003.py!}
```

Ansonsten würde der Pfad für `/users/{user_id}` auch `/users/me` auswerten, und annehmen, dass ein Parameter `user_id` mit dem Wert `"me"` übergeben wurde.

Sie können eine Pfadoperation auch nicht erneut definieren:

```Python hl_lines="6  11"
{!../../../docs_src/path_params/tutorial003b.py!}
```

    ```Python hl_lines="9"
    {!> ../../../docs_src/query_params_str_validations/tutorial011.py!}
    ```

=== "🐍 3️⃣.9️⃣ & 🔛"

    ```Python hl_lines="9"
    {!> ../../../docs_src/query_params_str_validations/tutorial011_py39.py!}
    ```

=== "🐍 3️⃣.1️⃣0️⃣ & 🔛"

    ```Python hl_lines="7"
    {!> ../../../docs_src/query_params_str_validations/tutorial011_py310.py!}
    ```

⤴️, ⏮️ 📛 💖:

    ```Python hl_lines="1  3"
    {!> ../../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="1  3"
    {!> ../../../docs_src/path_params_numeric_validations/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="3-4"
    {!> ../../../docs_src/path_params_numeric_validations/tutorial001_an.py!}
    ```

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="11"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an.py!}
    ```

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="11"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an.py!}
    ```

from ._compat import PYDANTIC_V2, PYDANTIC_VERSION, Undefined

_Unset: Any = Undefined


class ParamTypes(Enum):
    query = "query"
    header = "header"
    path = "path"
    cookie = "cookie"


class Param(FieldInfo):
    in_: ParamTypes

    def __init__(
        self,
        default: Any = Undefined,
        *,
        default_factory: Union[Callable[[], Any], None] = _Unset,

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="10"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="11"
    {!> ../../../docs_src/query_params_str_validations/tutorial003_an.py!}
    ```

	}{
		// Test case - 1.
		// A Valid v4 presign URL requires the following params to be in the query.
		// "X-Amz-Algorithm", "X-Amz-Credential", "X-Amz-Signature", " X-Amz-Date", "X-Amz-SignedHeaders", "X-Amz-Expires".
		// If these params are missing its expected to get ErrInvalidQueryParams .
		// In the following test case 2 out of 6 query params are missing.
		{
			inputQueryKeyVals: []string{
				"X-Amz-Algorithm", "",

		if err != nil {
			return nil, err
		}

		qosEnv := target.EnvMQTTQoS
		if k != config.Default {
			qosEnv = qosEnv + config.Default + k
		}

		// Parse uint8 value
		qos, err := strconv.ParseUint(env.Get(qosEnv, kv.Get(target.MqttQoS)), 10, 8)
		if err != nil {
			return nil, err
		}

		topicEnv := target.EnvMQTTTopic
		if k != config.Default {

  // If absent, there are no parameters for this policy and the param CEL variable will not be provided to validation expressions.
  // If ParamKind refers to a non-existent kind, this policy definition is mis-configured and the FailurePolicy is applied.
  // If paramKind is specified but paramRef is unset in ValidatingAdmissionPolicyBinding, the params variable will be null.
  // +optional
  optional ParamKind paramKind = 1;