# Classe SelectFields
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A classe `SelectFields` cria um novo `DynamicFrame` com base em um `DynamicFrame` existente e mantém somente os campos que você especificar. `SelectFields` oferece uma funcionalidade semelhante a uma instrução SQL `SELECT`.

## Exemplo
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Recomendamos usar o método [`DynamicFrame.select_fields()`](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#aws-glue-api-crawler-pyspark-extensions-dynamic-frame-select_fields) para selecionar campos de um `DynamicFrame`. Para visualizar um código de exemplo, consulte [Exemplo: usar select\$1fields para criar um novo `DynamicFrame` com os campos escolhidos](aws-glue-api-crawler-pyspark-extensions-dynamic-frame.md#pyspark-select_fields-example).

## Métodos
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+ [\$1\$1call\$1\$1](#aws-glue-api-crawler-pyspark-transforms-SelectFields-__call__)
+ [apply](#aws-glue-api-crawler-pyspark-transforms-SelectFields-apply)
+ [name](#aws-glue-api-crawler-pyspark-transforms-SelectFields-name)
+ [describeArgs](#aws-glue-api-crawler-pyspark-transforms-SelectFields-describeArgs)
+ [describeReturn](#aws-glue-api-crawler-pyspark-transforms-SelectFields-describeReturn)
+ [describeTransform](#aws-glue-api-crawler-pyspark-transforms-SelectFields-describeTransform)
+ [describeErrors](#aws-glue-api-crawler-pyspark-transforms-SelectFields-describeErrors)
+ [Descrever](#aws-glue-api-crawler-pyspark-transforms-SelectFields-describe)

## \$1\$1call\$1\$1(frame, paths, transformation\$1ctx = "", info = "", stageThreshold = 0, totalThreshold = 0)
<a name="aws-glue-api-crawler-pyspark-transforms-SelectFields-__call__"></a>

Recebe campos (nós) em um `DynamicFrame`.
+ `frame`: o `DynamicFrame` onde os campos serão selecionados (obrigatório).
+ `paths` – Uma lista de caminhos completos para os campos a serem selecionados (obrigatório).
+ `transformation_ctx` – Uma string única que é usada para identificar informações de estado (opcional).
+ `info`: uma cadeira de caracteres que é associada a erros na transformação (opcional).
+ `stageThreshold`: o número máximo de erros que podem ocorrer na transformação antes que ela falhe (opcional). O padrão é zero.
+ `totalThreshold`: o número máximo de erros que podem ocorrer em geral antes que falhe (opcional). O padrão é zero.

Retorna um novo `DynamicFrame` que contém somente os campos especificados.

## aplicar(cls, \$1args, \$1\$1kwargs)
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Herdado de `GlueTransform` [apply](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-apply).

## name(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-SelectFields-name"></a>

Herdado de `GlueTransform` [nome](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-name).

## describeArgs(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-SelectFields-describeArgs"></a>

Herdado de `GlueTransform` [describeArgs](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeArgs).

## describeReturn(cls)
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Herdado de `GlueTransform` [describeReturn](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeReturn).

## describeTransform(cls)
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Herdado de `GlueTransform` [describeTransform](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeTransform).

## describeErrors(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-SelectFields-describeErrors"></a>

Herdado de `GlueTransform` [describeErrors](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeErrors).

## describe(cls)
<a name="aws-glue-api-crawler-pyspark-transforms-SelectFields-describe"></a>

Herdado de `GlueTransform` [describe](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describe).