[tool.fastapi]
entrypoint = "my_app.main:app"
```

### Use `fastapi` with a path

When adding the entrypoint to `pyproject.toml` is not possible, or the user explicitly asks not to, or it's running an independent small app, you can pass the app file path to the `fastapi` command:

```bash
fastapi dev my_app/main.py
```

Prefer to set the entrypoint in `pyproject.toml` when possible.

## Use `Annotated`

* The variable `items_t` is a `tuple` with 3 items, an `int`, another `int`, and a `str`.
* The variable `items_s` is a `set`, and each of its items is of type `bytes`.

#### Dict { #dict }

To define a `dict`, you pass 2 type parameters, separated by commas.

The first type parameter is for the keys of the `dict`.

The second type parameter is for the values of the `dict`:

{* ../../docs_src/body_updates/tutorial002_py310.py hl[32] *}

### Using Pydantic's `update` parameter { #using-pydantics-update-parameter }

Now, you can create a copy of the existing model using `.model_copy()`, and pass the `update` parameter with a `dict` containing the data to update.

Like `stored_item_model.model_copy(update=update_data)`:

{* ../../docs_src/body_updates/tutorial002_py310.py hl[33] *}

			err = erasure.DecodeDataBlocks(encoded)
		}

		if err == nil && test.shouldFail {
			t.Errorf("Test %d: test should fail but it passed", i)
		}
		if err != nil && !test.shouldFail {
			t.Errorf("Test %d: test should pass but it failed: %v", i, err)
		}

		decoded := encoded
		if !test.shouldFail {
			if test.reconstructParity {
				for j := range decoded {
					if decoded[j] == nil {

 *       create a "fake" converter for a unit test. It is unnecessary (and confusing) to <i>mock</i>
 *       the {@code Converter} type using a mocking framework.
 *   <li>Pass two lambda expressions or method references to the {@link #from from} factory method.
 *   <li>Extend this class and implement its {@link #doForward} and {@link #doBackward} methods.
 * </ul>
 *
 * <p>Using a converter:
 *

  }

  public void testNulls() {
    /*
     * Don't bother testing. All non-primitive parameters are used only to construct error messages.
     * We never want to pass null for them, so we haven't annotated them to say that null is
     * allowed. But at the same time, it seems wasteful to bother inserting the checkNotNull calls
     * that NullPointerTester wants.
     *

 * <code>java.lang.CharSequence</code> rather than <code>java.lang.String</code>. This is provided mainly as a
 * convenience, to enable developers to pass things like <code>java.lang.StringBuffer</code> directly into the logger,
 * rather than formatting first by calling <code>toString()</code>.
 *
 *
 * @deprecated Use SLF4J directly
 */
@Deprecated

        for (String uri : imageUris) {
            resetMocks();
            mockRequest.setRequestURI(uri);
            testableFilter.doFilter(mockRequest, mockResponse, mockFilterChain);
            assertTrue("Expected pass-through for: " + uri, mockFilterChain.wasDoFilterCalled());
        }
    }

    @Test
    public void test_doFilter_fontExcluded() throws IOException, ServletException {
        setConfig(10, 10);

	return srv
}

// UseHandler configure final handler for this HTTP *Server
func (srv *Server) UseHandler(h http.Handler) *Server {
	srv.Handler = h
	return srv
}

// UseTLSConfig pass configured TLSConfig for this HTTP *Server
func (srv *Server) UseTLSConfig(cfg *tls.Config) *Server {
	srv.TLSConfig = cfg
	return srv
}

// UseBaseContext use custom base context for this HTTP *Server

Import `ServerSentEvent` from `fastapi.sse`:

{* ../../docs_src/server_sent_events/tutorial002_py310.py hl[4,26] *}

The `data` field is always encoded as JSON. You can pass any value that can be serialized as JSON, including Pydantic models.

## Raw Data { #raw-data }

If you need to send data **without** JSON encoding, use `raw_data` instead of `data`.