¿Recuerdas todos esos errores de **"404 Not Found"** (y chistes)?

## Usa `HTTPException` { #use-httpexception }

Para devolver responses HTTP con errores al cliente, usa `HTTPException`.

### Importa `HTTPException` { #import-httpexception }

{* ../../docs_src/handling_errors/tutorial001_py39.py hl[1] *}

### Lanza un `HTTPException` en tu código { #raise-an-httpexception-in-your-code }

	}
	return ct.SQLColumnType.DecimalSize()
}

// Nullable reports whether the column may be null.
func (ct ColumnType) Nullable() (nullable bool, ok bool) {
	if ct.NullableValue.Valid {
		return ct.NullableValue.Bool, true
	}
	return ct.SQLColumnType.Nullable()
}

// Unique reports whether the column may be unique.
func (ct ColumnType) Unique() (unique bool, ok bool) {

    }

    @Override
    public void setPriority(int priority) {
        throw new UnsupportedOperationException();
    }

    @Override
    public String getDescription() {
        return "Reports incorrect usages of integration test fixtures";
    }

    @Override
    protected Class<?> getAstVisitorClass() {
        return IntegrationTestFixtureVisitor.class;
    }

package org.apache.maven.api.services;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.LongAdder;
import java.util.function.Predicate;
import java.util.stream.Stream;

Certifique-se de criar um [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, ativá-lo e então instalá-lo, por exemplo:

```console
$ pip install python-multipart
```

///

## Importe `Form` { #import-form }

Importe `Form` de `fastapi`:

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[3] *}

## Defina parâmetros de `Form` { #define-form-parameters }

package org.apache.maven.plugin.descriptor;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

import org.apache.maven.plugin.Mojo;
import org.codehaus.plexus.component.repository.ComponentDescriptor;
import org.codehaus.plexus.configuration.PlexusConfiguration;

		return opd
	}
	return arm64.SPOP_END
}

// IsARM64ADR reports whether the op (as defined by an arm64.A* constant) is
// one of the comparison instructions that require special handling.
func IsARM64ADR(op obj.As) bool {
	switch op {
	case arm64.AADR, arm64.AADRP:
		return true
	}
	return false
}

// IsARM64CMP reports whether the op (as defined by an arm64.A* constant) is

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"context"
	"os"
	"reflect"
	"testing"
)

// Tests stripping standard ports from apiEndpoints.
func TestStripStandardPorts(t *testing.T) {
	apiEndpoints := []string{"http://127.0.0.1:9000", "http://127.0.0.2:80", "https://127.0.0.3:443"}

## Usa `StaticFiles` { #use-staticfiles }

* Importa `StaticFiles`.
* "Monta" una instance de `StaticFiles()` en un path específico.

{* ../../docs_src/static_files/tutorial001_py39.py hl[2,6] *}

/// note | Detalles Técnicos

También podrías usar `from starlette.staticfiles import StaticFiles`.

///

## Ejecuta el Programa del Servidor { #run-the-server-program }

Si instalaste un servidor ASGI manualmente, normalmente necesitarías pasar una cadena de import en un formato especial para que importe tu aplicación FastAPI:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 80