```Python hl_lines="8"
{!../../../docs_src/events/tutorial001.py!}
```

In this case, the `startup` event handler function will initialize the items "database" (just a `dict`) with some values.

You can add more than one event handler function.

And your application won't start receiving requests until all the `startup` event handlers have completed.

         *             const val K = 1
         *         }
         *     }
         *
         * the compiler reports "Variable 'K' must be initialized". This happens because there is no guarantee that the companion object
         * was initialized at the time when we use `C.K` for the enum entry `ONE`. To avoid this type of compiler errors, we don't shorten

*   `tf.all_variables`, `tf.VARIABLES` and `tf.initialize_all_variables` renamed
    to `tf.global_variables`, `tf.GLOBAL_VARIABLES` and
    `tf.global_variables_initializer` respectively.
*   `tf.zeros_initializer()` and `tf.ones_initializer()` now return a callable
    that must be called with initializer arguments, in your code replace
    `tf.zeros_initializer` with `tf.zeros_initializer()`

## Bug Fixes and Other Changes

        MustBeInitializedWarningImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.MUST_BE_INITIALIZED_OR_BE_FINAL) { firDiagnostic ->
        MustBeInitializedOrBeFinalImpl(
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }

    ```

=== "Python 3.8+"

    ```Python hl_lines="9"
    {!> ../../../docs_src/sql_databases/sql_app/main.py!}
    ```

#### Alembic Note

Normally you would probably initialize your database (create tables, etc) with <a href="https://alembic.sqlalchemy.org/en/latest/" class="external-link" target="_blank">Alembic</a>.

And you would also use Alembic for "migrations" (that's its main job).

    override val initializer: KtInitializerValue?
        get() = withValidityAssertion {
            val initializer = when (val psi = psi) {
                is KtProperty -> psi.initializer
                is KtParameter -> psi
                else -> null
            }

            createKtInitializerValue(initializer, descriptor, analysisContext)
        }

    if (compileTimeInitializer != null) {
        return KtConstantInitializerValue(compileTimeInitializer.toKtConstantValue(), initializer)
    }
    if (initializer != null) {
        val bindingContext = analysisContext.analyze(initializer)
        val constantValue = ConstantExpressionEvaluator.getConstant(initializer, bindingContext)
        if (constantValue != null) {

                // For postfix case, the last argument is the operation call invoked on a synthetic local variable `<unary>`. This local
                // variable is initialized by calling the `get` function.
                val operationCall = lastArg as? FirFunctionCall ?: return null

* Initialize French translations. PR [#1975](https://github.com/tiangolo/fastapi/pull/1975) by [@JulianMaurin-BM](https://github.com/JulianMaurin-BM).
* Initialize Turkish translations. PR [#1905](https://github.com/tiangolo/fastapi/pull/1905) by [@ycd](https://github.com/ycd).

### Internal

    override val name: Name
        get() = withValidityAssertion { descriptor.name }

    // There doesn't seem to be a way to determine if `descriptor` has a body or not, so we return an initializer even for enum entries
    // without a body.
    override val enumEntryInitializer: KtEnumEntryInitializerSymbol?
        get() = this