!!! note "Hinweis"
    Wenn Sie ein Python-Experte sind und bereits alles über Typhinweise wissen, überspringen Sie dieses Kapitel und fahren Sie mit dem nächsten fort.

## Motivation

Fangen wir mit einem einfachen Beispiel an:

```Python
{!../../../docs_src/python_types/tutorial001.py!}
```

Dieses Programm gibt aus:

```
John Doe

class CustomTrust {
  // PEM files for root certificates of Comodo and Entrust. These two CAs are sufficient to view
  // https://publicobject.com (Comodo) and https://squareup.com (Entrust). But they aren't
  // sufficient to connect to most HTTPS sites including https://godaddy.com and https://visa.com.
  // Typically developers will need to get a PEM file from their organization's TLS administrator.

### Parallel Hamburgerler

Şimdi bunların "Eşzamanlı Hamburger" değil, "Paralel Hamburger" olduğunu düşünelim.

Hamburger 🍔 almak için 😍 aşkınla Paralel fast food'a gidiyorsun.

Birden fazla kasiyer varken (varsayalım 8) sıraya girdiniz👩‍🍳👨‍🍳👩‍🍳👨‍🍳👩‍🍳👨‍🍳👩‍🍳👨‍🍳 ve sıranız gelene kadar bekliyorsunuz.

   * <pre>{@code
   * public static final ImmutableSortedMultiset<Bean> BEANS =
   *     new ImmutableSortedMultiset.Builder<Bean>(colorComparator())
   *         .addCopies(Bean.COCOA, 4)
   *         .addCopies(Bean.GARDEN, 6)
   *         .addCopies(Bean.RED, 8)
   *         .addCopies(Bean.BLACK_EYED, 10)
   *         .build();
   * }</pre>
   *

   * <pre>{@code
   * public static final ImmutableSortedMultiset<Bean> BEANS =
   *     new ImmutableSortedMultiset.Builder<Bean>(colorComparator())
   *         .addCopies(Bean.COCOA, 4)
   *         .addCopies(Bean.GARDEN, 6)
   *         .addCopies(Bean.RED, 8)
   *         .addCopies(Bean.BLACK_EYED, 10)
   *         .build();
   * }</pre>
   *

   * map.getOrDefault(k, defaultValue)} instead.
   *
   * @param map source map that determines the function behavior
   * @param defaultValue the value to return for inputs that aren't map keys
   * @return function that returns {@code map.get(a)} when {@code a} is a key, or {@code
   *     defaultValue} otherwise
   */

04E8          ; mapped                 ; 04E9          # 1.1  CYRILLIC CAPITAL LETTER BARRED O
04E9          ; valid                                  # 1.1  CYRILLIC SMALL LETTER BARRED O
04EA          ; mapped                 ; 04EB          # 1.1  CYRILLIC CAPITAL LETTER BARRED O WITH DIAERESIS
04EB          ; valid                                  # 1.1  CYRILLIC SMALL LETTER BARRED O WITH DIAERESIS

   * 3.7.0 this is also true. But OkHttp 3.3.1 through 3.6.0 treated these as different.
   */
  @Test
  fun forJavaName_fromLegacyEnumName() {
    // These would have been considered equal in OkHttp 3.3.1, but now aren't.
    assertThat(forJavaName("SSL_RSA_EXPORT_WITH_RC4_40_MD5"))
      .isEqualTo(forJavaName("TLS_RSA_EXPORT_WITH_RC4_40_MD5"))
    assertThat(forJavaName("SSL_DH_RSA_EXPORT_WITH_DES40_CBC_SHA"))

Da dies jedoch bedeuten würde, darauf zu warten, dass die Response durch das Netzwerk reist, während eine Ressource unnötigerweise in einer Abhängigkeit mit yield gehalten wird (z. B. eine Datenbankverbindung), wurde dies in FastAPI 0.106.0 geändert.

!!! tip "Tipp"

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