# FormatCase 类
<a name="aws-glue-api-pyspark-transforms-FormatCase"></a>

`FormatCase` 转换会将列中的每个字符串更改为指定的大小写类型。

## 示例
<a name="pyspark-FormatCase-examples"></a>

```
from pyspark.context import SparkContext
from pyspark.sql import SparkSession
from awsgluedi.transforms import *

sc = SparkContext()
spark = SparkSession(sc)

datasource1 = spark.read.json("s3://${BUCKET}/json/zips/raw/data")

try:
    df_output = data_cleaning.FormatCase.apply(
        data_frame=datasource1,
        spark_context=sc,
        source_column="city",
        case_type="LOWER"
    )    
except:
    print("Unexpected Error happened ")
    raise
```

## Output
<a name="pyspark-FormatCase-output"></a>

 `FormatCase` 转换会根据“case\$1type="LOWER"”参数将“city”列中的值转换为小写字母。生成的“df\$1output”DataFrame 将包含原始“datasource1”DataFrame 中的所有列，但“city”列的值为小写。

## 方法
<a name="aws-glue-api-pyspark-transforms-FormatCase-_methods"></a>
+ [\$1\$1call\$1\$1](#aws-glue-api-pyspark-transforms-FormatCase-__call__)
+ [apply](#aws-glue-api-crawler-pyspark-transforms-FormatCase-apply)
+ [name](#aws-glue-api-crawler-pyspark-transforms-FormatCase-name)
+ [describeArgs](#aws-glue-api-crawler-pyspark-transforms-FormatCase-describeArgs)
+ [describeReturn](#aws-glue-api-crawler-pyspark-transforms-FormatCase-describeReturn)
+ [describeTransform](#aws-glue-api-crawler-pyspark-transforms-FormatCase-describeTransform)
+ [describeErrors](#aws-glue-api-crawler-pyspark-transforms-FormatCase-describeErrors)
+ [describe](#aws-glue-api-crawler-pyspark-transforms-FormatCase-describe)

## \$1\$1call\$1\$1(spark\$1context, data\$1frame, source\$1column, case\$1type)
<a name="aws-glue-api-pyspark-transforms-FormatCase-__call__"></a>

`FormatCase` 转换会将列中的每个字符串更改为指定的大小写类型。
+ `source_column`：现有列的名称。
+ `case_type` – 支持的大小写类型为 `CAPITAL`、`LOWER`、`UPPER`、`SENTENCE`。

## apply(cls, \$1args, \$1\$1kwargs)
<a name="aws-glue-api-crawler-pyspark-transforms-FormatCase-apply"></a>

继承自 `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-FormatCase-name"></a>

继承自 `GlueTransform` [名称](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-FormatCase-describeArgs"></a>

继承自 `GlueTransform` [describeArgs](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeArgs)。

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

继承自 `GlueTransform` [describeReturn](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describeReturn)。

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

继承自 `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-FormatCase-describeErrors"></a>

继承自 `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-FormatCase-describe"></a>

继承自 `GlueTransform` [describe](aws-glue-api-crawler-pyspark-transforms-GlueTransform.md#aws-glue-api-crawler-pyspark-transforms-GlueTransform-describe)。