## Second dependency, "dependable" and "dependant"

Then you can create another dependency function (a "dependable") that at the same time declares a dependency of its own (so it is a "dependant" too):

//// tab | Python 3.10+

```Python hl_lines="13"
{!> ../../docs_src/dependencies/tutorial005_an_py310.py!}
```

////

//// tab | Python 3.9+

```Python hl_lines="13"

        return 0;
    }
    int writeDataWireFormat( byte[] dst, int dstIndex ) {
        if(( dst.length - dstIndex ) < pipeDataLen ) {
            if( log.level >= 3 )
                log.println( "TransCallNamedPipe data too long for buffer" );
            return 0;
        }
        System.arraycopy( pipeData, pipeDataOff, dst, dstIndex, pipeDataLen );
        return pipeDataLen;
    }

				grid.PutByteBuffer(buf.Bytes())
				return
			}
		}
	}()
	peers, _ := newPeerRestClients(globalEndpoints)
	err := globalHTTPListen.Subscribe(mask, localCh, ctx.Done(), func(ev event.Event) bool {
		if ev.S3.Bucket.Name != "" && bucketName != "" {
			if ev.S3.Bucket.Name != bucketName {
				return false
			}
		}
		return rulesMap.MatchSimple(ev.EventName, ev.S3.Object.Key)
	})
	if err != nil {

	// Prints documentation message.
	printObjectAPIMsg()
	if globalIsDistErasure {
		logger.Startup(color.Bold(banner))
	}
}

// Returns true if input is IPv6
func isIPv6(host string) bool {
	h, _, err := net.SplitHostPort(host)
	if err != nil {
		h = host
	}
	ip := net.ParseIP(h)
	return ip.To16() != nil && ip.To4() == nil
}

// strip api endpoints list with standard ports such as

## Caveat

If you need to perform heavy background computation and you don't necessarily need it to be run by the same process (for example, you don't need to share memory, variables, etc), you might benefit from using other bigger tools like <a href="https://docs.celeryq.dev" class="external-link" target="_blank">Celery</a>.

    }

    public void bool(BoolCall<RelatedQueryCQ> boolLambda) {
        bool(boolLambda, null);
    }

    public void bool(BoolCall<RelatedQueryCQ> boolLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        RelatedQueryCQ mustQuery = new RelatedQueryCQ();
        RelatedQueryCQ shouldQuery = new RelatedQueryCQ();
        RelatedQueryCQ mustNotQuery = new RelatedQueryCQ();

    }

    public void bool(BoolCall<RequestHeaderCQ> boolLambda) {
        bool(boolLambda, null);
    }

    public void bool(BoolCall<RequestHeaderCQ> boolLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        RequestHeaderCQ mustQuery = new RequestHeaderCQ();
        RequestHeaderCQ shouldQuery = new RequestHeaderCQ();
        RequestHeaderCQ mustNotQuery = new RequestHeaderCQ();

    }

    public void bool(BoolCall<RoleTypeCQ> boolLambda) {
        bool(boolLambda, null);
    }

    public void bool(BoolCall<RoleTypeCQ> boolLambda, ConditionOptionCall<BoolQueryBuilder> opLambda) {
        RoleTypeCQ mustQuery = new RoleTypeCQ();
        RoleTypeCQ shouldQuery = new RoleTypeCQ();
        RoleTypeCQ mustNotQuery = new RoleTypeCQ();
        RoleTypeCQ filterQuery = new RoleTypeCQ();

from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

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):

from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

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):