///

## Import Pydantic's `BaseModel`

First, you need to import `BaseModel` from `pydantic`:

{* ../../docs_src/body/tutorial001_py310.py hl[2] *}

## Create your data model

Then you declare your data model as a class that inherits from `BaseModel`.

Use standard Python types for all the attributes:

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}

    suite.addTest(
        SetTestSuiteBuilder.using(
                new TestStringSetGenerator() {
                  @Override
                  protected Set<String> create(String[] elements) {
                    return CompactLinkedHashSet.create(asList(elements));
                  }
                })
            .named("CompactLinkedHashSet")
            .withFeatures(allFeatures)
            .createTestSuite());

    private String workstation;
    private byte[] masterKey = null;
    private byte[] sessionKey = null;
    private byte[] mic = null;
    private boolean micRequired;


    /**
     * Creates a Type-3 message using default values from the current
     * environment.
     * 
     * @param tc
     *            context to use
     */
    public Type3Message ( CIFSContext tc ) {

    int hash = map.hash(key);
    Object value = new Object();
    int index = hash & (table.length() - 1);

    DummyEntry<Object, Object> entry = DummyEntry.create(key, hash, null);
    DummyValueReference<Object, Object> valueRef = DummyValueReference.create(value);
    entry.setValueReference(valueRef);
    table.set(index, entry);
    segment.count++;

    assertSame(value, map.get(key, loader));

    int hash = map.hash(key);
    Object value = new Object();
    int index = hash & (table.length() - 1);

    DummyEntry<Object, Object> entry = DummyEntry.create(key, hash, null);
    DummyValueReference<Object, Object> valueRef = DummyValueReference.create(value);
    entry.setValueReference(valueRef);
    table.set(index, entry);
    segment.count++;

    assertSame(value, map.get(key, loader));

    int expectedValuesPerKey = ImmutableCollection.Builder.DEFAULT_INITIAL_CAPACITY;

    /**
     * Creates a new builder. The returned builder is equivalent to the builder generated by {@link
     * ImmutableMultimap#builder}.
     */
    public Builder() {}

    /** Creates a new builder with a hint for the number of distinct keys. */
    Builder(int expectedKeys) {
      if (expectedKeys > 0) {

			testResults = append(testResults, result{dir, entries})
			t.Fatalf("Unable to create a file, %s", err)
		}
		// Symlink will not be added to entries.
		if err := os.Symlink(filepath.Join(dir, name1), filepath.Join(dir, name2)); err != nil {
			t.Fatalf("Unable to create a symlink, %s", err)
		}
		// Add to entries.
		entries = append(entries, name1)

    /** Returns a new response body that transmits this byte array. */
    @JvmStatic
    @JvmName("create")
    fun ByteArray.toResponseBody(contentType: MediaType? = null): ResponseBody = commonToResponseBody(contentType)

    /** Returns a new response body that transmits this byte string. */
    @JvmStatic
    @JvmName("create")

  private TestCallable firstCallable;

  @Override
  public void setUp() throws Exception {
    executor = Executors.newCachedThreadPool();
    serializer = ExecutionSequencer.create();
    firstFuture = SettableFuture.create();
    firstCallable = new TestCallable(firstFuture);
  }

  @Override
  public void tearDown() throws Exception {
    executor.shutdown();
  }

            "paths": {
                "/invoices/": {
                    "post": {
                        "summary": "Create Invoice",