The history of **FastAPI** is in great part the history of its predecessors.

As said in the section [Alternatives](alternatives.md){.internal-link target=_blank}:

<blockquote markdown="1">

**FastAPI** wouldn't exist if not for the previous work of others.

There have been many tools created before that have helped inspire its creation.

    DescendingTestMapGenerator(TestSortedMapGenerator<K, V> delegate) {
      super(delegate);
    }

    @Override
    public NavigableMap<K, V> create(Object... entries) {
      NavigableMap<K, V> map = (NavigableMap<K, V>) delegate.create(entries);
      return map.descendingMap();
    }

    @Override
    public Iterable<Entry<K, V>> order(List<Entry<K, V>> insertionOrder) {

	APIs(context.Context) ([]madmin.KMSAPI, error)

	// Stat returns the current KMS status.
	Status(context.Context) (map[string]madmin.ItemState, error)

	// CreateKey creates a new key at the KMS with the given key ID.
	CreateKey(context.Context, *CreateKeyRequest) error

	ListKeys(context.Context, *ListRequest) ([]madmin.KMSKeyInfo, string, error)

	// created when the disk was down.
	err = os.RemoveAll(path.Join(fsDirs[0], bucket))
	if err != nil {
		t.Fatal(err)
	}
	// This would create the bucket.
	_, err = obj.HealBucket(ctx, bucket, madmin.HealOpts{
		DryRun: false,
		Remove: false,
	})
	if err != nil {
		t.Fatal(err)
	}
	// Stat the bucket to make sure that it was created.

    void testContextAccess() {
        // When
        NameServiceClientImpl client = new NameServiceClientImpl(mockContext);

        // Then
        assertNotNull(client, "Client should be created successfully");
        verify(mockContext, atLeastOnce()).getConfig();
    }

    @Test
    @DisplayName("Should handle invalid NetBIOS name quickly")

  // By preference, we will use the Thread constructor that has an `inheritThreadLocals` parameter.
  // But before Java 9, our only way not to inherit ThreadLocals is to zap them after the thread
  // is created, by accessing a private field.
  private static final @Nullable Constructor<Thread> bigThreadConstructor =
      getBigThreadConstructor();

  private static final @Nullable Field inheritableThreadLocals =

      return gen.samples();
    }

    @Override
    public Set<E> create(Object... elements) {
      Object[] duplicated = new Object[elements.length * 2];
      for (int i = 0; i < elements.length; i++) {
        duplicated[i] = elements[i];
        duplicated[i + elements.length] = elements[i];
      }
      return ((Multiset<E>) gen.create(duplicated)).elementSet();
    }

    @Override

                QueryBuilders.functionScoreQuery(ScoreFunctionBuilders.randomFunction().seed(seed).setField("_seq_no"))).setQueryWeight(0)
                        .setRescoreQueryWeight(1);
    }

    /**
     * Creates a PopularWordsResponse from the OpenSearch SearchResponse.
     * @param searchResponse The OpenSearch SearchResponse.
     * @return A PopularWordsResponse instance.
     */

        byte[] data = new byte[] { 0x78, 0x56, 0x34, 0x12 };
        PacDataInputStream pdis = createInputStream(data);
        SID sid = pdis.readId();
        // The readId method creates a SID with authority 5 and the RID value
        // Expected format: S-1-5-305419896
        String sidString = sid.toString();
        assertNotNull(sidString);
        assertEquals("S-1-5-305419896", sidString);
    }

You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.