To add it to your *path operation*, declare it the same way you declared path and query parameters:

{* ../../docs_src/body/tutorial001_py310.py hl[16] *}

...and declare its type as the model you created, `Item`.

## Results { #results }

With just that Python type declaration, **FastAPI** will:

* Read the body of the request as JSON.
* Convert the corresponding types (if needed).
* Validate the data.

# Object Lambda

            thread.start();
        }

        // Wait for all threads to complete
        for (Thread thread : threads) {
            thread.join();
        }

        // Check all providers were created successfully
        for (int i = 0; i < threadCount; i++) {
            assertNull("Thread " + i + " threw exception", exceptions[i]);
            assertNotNull("Thread " + i + " failed to create provider", providers[i]);

         *
         * 2b. If the resolved types are different from the original types, things are trickier. The
         * only way to get a TypeVariable instance for the resolved types is to create our own. The
         * created TypeVariable will not interoperate with any JDK TypeVariable. But this is OK: We
         * don't _want_ our new TypeVariable to be equal to the JDK TypeVariable because it has

    /**
     * Create a StopwordsItem from the form data.
     *
     * @param form the create form containing the item data
     * @param hook the validation error hook
     * @return optional entity containing the created stopwords item
     */
    public static OptionalEntity<StopwordsItem> createStopwordsItem(final CreateForm form, final VaErrorHook hook) {
        return getEntity(form).map(entity -> {

  private final Stats yStats;
  private final double sumOfProductsOfDeltas;

  /**
   * Internal constructor. Users should use {@link PairedStatsAccumulator#snapshot}.
   *
   * <p>To ensure that the created instance obeys its contract, the parameters should satisfy the
   * following constraints. This is the callers responsibility and is not enforced here.
   *
   * <ul>

   * @return {@link Inet4Address} corresponding to the supplied byte array
   * @throws IllegalArgumentException if a valid {@link Inet4Address} can not be created
   */
  private static Inet4Address getInet4Address(byte[] bytes) {
    checkArgument(
        bytes.length == 4,
        "Byte array has invalid length for an IPv4 address: %s != 4.",
        bytes.length);

		c.Fatalf("policy info err: %v", err)
	}

	// Check that policy with comma is rejected.
	err = s.adm.AddCannedPolicy(ctx, "invalid,policy", policyBytes)
	if err == nil {
		c.Fatalf("invalid policy created successfully")
	}

	infoStr := string(info)
	if !strings.Contains(infoStr, `"s3:PutObject"`) || !strings.Contains(infoStr, ":"+bucket+"/") {
		c.Fatalf("policy contains unexpected content!")
	}
}

        assertEquals("value1", testParams.get("key1"));
        assertEquals(456, testParams.get("key2"));

        // Verify that modifications to original map don't affect created instance
        inputMap.put("key3", "value3");
        assertFalse(testParams.containsKey("key3"));
    }

    // Test protected constructor with ParamMap
    public void test_protectedConstructorWithParamMap() {

        /**
         * Applies the function to create a query builder for the specified field and boost.
         * @param field The field name.
         * @param boost The boost value.
         * @return The created query builder.
         */
        QueryBuilder apply(String field, float boost);
    }