* 看看你是否能理解提问者的**目的**和使用场景。

* 然后检查问题（绝大多数是提问）是否**清晰**。

* 很多时候，问题是围绕提问者想象中的解决方案，但可能有**更好的**方案。如果你更好地理解了问题和使用场景，你就可能提出更**合适的替代方案**。

* 如果你没能理解问题，请请求更多**细节**。

### 复现问题 { #reproduce-the-problem }

在大多数情况下与问题相关的都是提问者的**原始代码**。

很多时候他们只会粘贴一小段代码，但这不足以**复现问题**。

* 你可以请他们提供一个[可最小复现的示例](https://stackoverflow.com/help/minimal-reproducible-example)，你可以**复制粘贴**并在本地运行，看到与他们相同的错误或行为，或者更好地理解他们的用例。

    /**
     * Cuts this string up into alternating parameter names and values. This divides a query string
     * like `subject=math&easy&problem=5-2=3` into the list `["subject", "math", "easy", null,
     * "problem", "5-2=3"]`. Note that values may be null and may contain '=' characters.
     */
    private fun String.toQueryNamesAndValues(): MutableList<String?> {

   * for an RPC may wait for a similar call that requests a long timeout, or a call by an
   * unprivileged user may return a resource accessible only to a privileged user making a similar
   * call. To prevent this problem, create a key object that includes all values that affect the
   * result of the query. Or use {@code LoadingCache.get(K)}, which lacks the ability to refer to
   * state other than that in the key.
   *

	// Verify if region is valid.
	sRegion := cred.scope.region
	// Region is set to be empty, we use whatever was sent by the
	// request and proceed further. This is a work-around to address
	// an important problem for ListBuckets() getting signed with
	// different regions.
	if region == "" {
		region = sRegion
	}
	// Should validate region, only if region is set.
	if !isValidRegion(sRegion, region) {

/**
 * Unit test of {@link MutableTypeToInstanceMap}.
 *
 * @author Ben Yu
 */
@NullUnmarked
public class MutableTypeToInstanceMapTest extends TestCase {

  @AndroidIncompatible // problem with suite builders on Android
  public static Test suite() {
    TestSuite suite = new TestSuite();
    suite.addTestSuite(MutableTypeToInstanceMapTest.class);

    suite.addTest(
        MapTestSuiteBuilder.using(

Dolayısıyla fonksiyonunuzu şöyle tanımlayabilirsiniz:

{* ../../docs_src/path_params_numeric_validations/tutorial002_py310.py hl[7] *}

Namun şunu unutmayın: `Annotated` kullanırsanız bu problem olmaz; çünkü `Query()` veya `Path()` için fonksiyon parametresi default değerlerini kullanmıyorsunuz.

{* ../../docs_src/path_params_numeric_validations/tutorial002_an_py310.py *}

## Verdopplung vermeiden { #reduce-duplication }

Die Reduzierung von Code-Verdoppelung ist eine der Kernideen von **FastAPI**.

Da die Verdopplung von Code die Wahrscheinlichkeit von Fehlern, Sicherheitsproblemen, Problemen mit der Desynchronisation des Codes (wenn Sie an einer Stelle, aber nicht an der anderen aktualisieren) usw. erhöht.

Und diese Modelle teilen alle eine Menge der Daten und verdoppeln Attributnamen und -typen.

    // The WHATWG Host parsing rules accepts some character codes which are invalid by
    // definition for OkHttp's host header checks (and the WHATWG Host syntax definition). Here
    // we rule out characters that would cause problems in host headers.
    if (c <= '\u001f' || c >= '\u007f') {
      return true
    }
    // Check for the characters mentioned in the WHATWG Host parsing spec:

  /**
   * Handles cases of updates involving initialization, resizing, creating new Cells, and/or
   * contention. See above for explanation. This method suffers the usual non-modularity problems of
   * optimistic retry code, relying on rechecked sets of reads.
   *
   * @param x the value
   * @param hc the hash code holder
   * @param wasUncontended false if CAS failed before call
   */

* 先確認你是否能理解提問者的**目的**與使用情境。

* 接著看看問題（絕大多數是提問）是否**清楚**。

* 很多時候，提問是基於使用者自己想像中的解法，但可能有**更好**的方法。如果你能更理解他們的問題與使用情境，你也許能提出更好的**替代解法**。

* 如果你無法理解問題，請要求提供更多**細節**。

### 重現問題 { #reproduce-the-problem }

在大多數情況與問題中，都會與對方的**原始程式碼**有關。

很多時候他們只會貼出一小段程式碼，但那不足以**重現問題**。

* 你可以請他們提供一個[最小可重現範例](https://stackoverflow.com/help/minimal-reproducible-example)，讓你可以**複製貼上**並在本機執行，看到與他們相同的錯誤或行為，或更好地理解他們的使用情境。