@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%"=="" goto skipRc
if exist "%PROGRAMDATA%\mavenrc.cmd" call "%PROGRAMDATA%\mavenrc.cmd" %*
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_pre.bat" echo Warning: The mavenrc_pre.bat script is deprecated and will be removed in a future version. >&2

say_hi()  # Oh, no, this throws an error! 😱
```

The `name` parameter is **still required** (not *optional*) because it doesn't have a default value. Still, `name` accepts `None` as the value:

```Python
say_hi(name=None)  # This works, None is valid 🎉
```

The good news is, once you are on Python 3.10 you won't have to worry about that, as you will be able to simply use `|` to define unions of types:

    }

    private static NtlmAuthenticator auth;

    private String url;
    private SmbAuthException sae;

    /**
     * Set the default <code>NtlmAuthenticator</code>. Once the default authenticator is set it cannot be changed. Calling
     * this metho again will have no effect.
     *
     * @param a the authenticator to set as default
     */

	"net/url"
	"os"
	"path/filepath"
	"strings"
	"time"

	"github.com/gomodule/redigo/redis"
	"github.com/minio/minio/internal/event"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/minio/internal/once"
	"github.com/minio/minio/internal/store"
	xnet "github.com/minio/pkg/v3/net"
)

// Redis constants
const (
	RedisFormat     = "format"
	RedisAddress    = "address"
	RedisPassword   = "password"

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):

       * timeoutFuture.setException() calls run(). That reentrancy would already be harmless, since
       * timeoutFuture can be set (and delegate cancelled) only once. (And "set only once" is
       * important for other reasons: run() can still be invoked concurrently in different threads,
       * even with the above null checks.)
       */
      timeoutFutureRef = null;

  operator fun plus(other: EventListener): EventListener {
    val left =
      when {
        this === NONE -> return other
        this is AggregateEventListener -> this.eventListeners
        else -> arrayOf(this)
      }
    val right =
      when {
        other === NONE -> return this
        other is AggregateEventListener -> other.eventListeners
        else -> arrayOf(other)
      }

                       var_name,
                       query_item,
                       enabled_by_default,
                       question=None,
                       yes_reply=None,
                       no_reply=None,
                       bazel_config_name=None):
  """Set boolean action_env variable.

  Ask user if query_item will be enabled. Default is used if no input is given.

#### `Optional`

`Optional` bir değişkenin `str`gibi bir tipi olabileceğini ama isteğe bağlı olarak tipinin `None` olabileceğini belirtir:

```Python hl_lines="1  4"
{!../../docs_src/python_types/tutorial009.py!}
```

`str` yerine `Optional[str]` kullanmak editorün bu değerin her zaman `str` tipinde değil bazen `None` tipinde de olabileceğini belirtir ve hataları tespit etmemizde yardımcı olur.

#### Generic tipler

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):