ff;background-color:#28a745;border-color:#23923d}.alert-default-success{color:#155724;background-color:#d4edda;border-color:#c3e6cb}.alert-default-success hr{border-top-color:#b1dfbb}.alert-default-success .alert-link{color:#0b2e13}.alert-info{color:#fff;background-color:#17a2b8;border-color:#148ea1}.alert-default-info{color:#0c5460;background-color:#d1ecf1;border-color:#bee5eb}.alert-default-info hr{border-top-color:#abdde5}.alert-default-info .alert-link{color:#062c33}.alert-warning{color:#1f2...

# classificationDefinitionMap: (NotRequired - Default map:{})
#
# The definition of classification.
#
# Specification:
# map: {
#     [classification-name] = list:{
#         ; map:{
#             ; topComment=[comment]; codeType=[String(default) or Number or Boolean]}
#             ; undefinedHandlingType=[EXCEPTION or LOGGING(default) or ALLOWED]
#             ; isUseDocumentOnly=[true or false(default)]

 * triggers all preceding phases, ensuring that each step of the build process is
 * completed in the correct order. The three main lifecycles in Maven are
 * {@link #DEFAULT default}, {@link #CLEAN clean}, and {@link #SITE site}, with the
 * {@code default} lifecycle being the most commonly used for project builds.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Lifecycle extends ExtensibleEnum {

    }

    @Test
    @DisplayName("Default ctor: null message/cause; toString is class name; type hierarchy")
    void defaultConstructor_hasNullMessageAndCause_andTypeHierarchy() {
        // Arrange & Act
        SMBProtocolDowngradeException ex = new SMBProtocolDowngradeException();

        // Assert - message and cause are null
        assertNull(ex.getMessage(), "Default constructor should have null message");

Like `item.model_dump(exclude_unset=True)`.

That would generate a `dict` with only the data that was set when creating the `item` model, excluding default values.

Then you can use this to generate a `dict` with only the data that was set (sent in the request), omitting default values:

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

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

```

/// tip

The second argument to <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is the default value to return.

If not provided, it's `None` by default, here we provide `"World"` as the default value to use.

///

Then you could call that Python program:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console

        this.pageNumberList = pageNumberList;
    }

    /**
     * Get the default current page number.
     * @return The default current page number.
     */
    protected int getDefaultCurrentPageNumber() {
        return Constants.DEFAULT_ADMIN_PAGE_NUMBER;
    }

    /**
     * Get the default page size.
     * @return The default page size.
     */
    protected int getDefaultPageSize() {

        id = null;
    }

    /**
     * Gets the default page size from configuration.
     * @return The default page size.
     */
    protected int getDefaultPageSize() {
        return ComponentUtil.getFessConfig().getPagingPageSizeAsInteger();
    }

    /**
     * Gets the default current page number.
     * @return The default current page number.
     */
    protected int getDefaultCurrentPageNumber() {

     */
    public RolePager() {
        super();
    }

    private static final long serialVersionUID = 1L;

    /**
     * Default page size for pagination.
     */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /**
     * Default current page number for pagination.
     */
    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /**
     * Total number of records.
     */

    }

    @Test
    void testIsEndOfSearch() {
        // Test the isEndOfSearch method
        // By default, it should be false
        assertFalse(response.isEndOfSearch());
    }

    @Test
    void testGetNumEntries() {
        // Test the getNumEntries method
        // By default, it should be 0
        assertEquals(0, response.getNumEntries());
    }

    @Test
    void testGetResults() {