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# FlatMap kelas
<a name="aws-glue-api-crawler-pyspark-transforms-flat-map"></a>

 Menerapkan transformasi ke masing-masing `DynamicFrame` dalam koleksi. Hasil tidak diratakan menjadi satu`DynamicFrame`, tetapi dipertahankan sebagai koleksi. 

## Contoh untuk FlatMap
<a name="aws-glue-api-crawler-pyspark-flat-map-examples"></a>

 Contoh cuplikan berikut menunjukkan bagaimana menggunakan `ResolveChoice` transformasi pada koleksi frame dinamis ketika diterapkan ke file. `FlatMap` Data yang digunakan untuk input ada di JSON yang terletak di alamat Amazon S3 placeholder `s3://bucket/path-for-data/sample.json` dan berisi data berikut. 

### Contoh data JSON
<a name="aws-glue-api-crawler-pyspark-flat-map-examples-json"></a>

```
[{
    "firstname": "Arnav",
    "lastname": "Desai",
    "address": {
        "street": "6 Anyroad Avenue",
        "city": "London",
        "state": "England",
        "country": "UK"
    },
    "phone": 17235550101,
    "affiliations": [
        "General Anonymous Example Products",
        "Example Independent Research",
        "Government Department of Examples"
    ]
},
{
    "firstname": "Mary",
    "lastname": "Major",
    "address": {
        "street": "7821 Spot Place",
        "city": "Centerville",
        "state": "OK",
        "country": "US"
    },
    "phone": 19185550023,
    "affiliations": [
        "Example Dot Com",
        "Example Independent Research",
        "Example.io"
    ]
},
{
    "firstname": "Paulo",
    "lastname": "Santos",
    "address": {
        "street": "123 Maple Street",
        "city": "London",
        "state": "Ontario",
        "country": "CA"
    },
    "phone": 12175550181,
    "affiliations": [
        "General Anonymous Example Products",
        "Example Dot Com"
    ]
}]
```

**Example Terapkan ResolveChoice ke DynamicFrameCollection dan tampilkan output.**  

```
#Read DynamicFrame
datasource = glueContext.create_dynamic_frame_from_options("s3", connection_options = {"paths":["s3://bucket/path/to/file/mysamplejson.json"]}, format="json")
datasource.printSchema()
datasource.show()

## Split to create a DynamicFrameCollection
split_frame=datasource.split_fields(["firstname","lastname","address"],"personal_info","business_info")
split_frame.keys()
print("---")

## Use FlatMap to run ResolveChoice
kwargs = {"choice": "cast:string"}
flat = FlatMap.apply(split_frame, ResolveChoice, frame_name="frame", transformation_ctx='tcx', **kwargs)
flat.keys()

##Select one of the DynamicFrames
personal_info = flat.select("personal_info")
personal_info.printSchema()
personal_info.show()
print("---")

business_info = flat.select("business_info")
business_info.printSchema()
business_info.show()
```
 Saat menelepon`FlatMap.apply`, `frame_name` parameternya **harus**`"frame"`. Tidak ada nilai lain yang diterima saat ini. 

### Contoh Output
<a name="aws-glue-api-crawler-pyspark-flat-map-examples"></a>

```
root
|-- firstname: string
|-- lastname: string
|-- address: struct
|    |-- street: string
|    |-- city: string
|    |-- state: string
|    |-- country: string
|-- phone: long
|-- affiliations: array
|    |-- element: string
---
{
    "firstname": "Mary",
    "lastname": "Major",
    "address": {
        "street": "7821 Spot Place",
        "city": "Centerville",
        "state": "OK",
        "country": "US"
    },
    "phone": 19185550023,
    "affiliations": [
        "Example Dot Com",
        "Example Independent Research",
        "Example.io"
    ]
}

{
    "firstname": "Paulo",
    "lastname": "Santos",
    "address": {
        "street": "123 Maple Street",
        "city": "London",
        "state": "Ontario",
        "country": "CA"
    },
    "phone": 12175550181,
    "affiliations": [
        "General Anonymous Example Products",
        "Example Dot Com"
    ]
}
---
root
|-- firstname: string
|-- lastname: string
|-- address: struct
|    |-- street: string
|    |-- city: string
|    |-- state: string
|    |-- country: string

{
    "firstname": "Mary",
    "lastname": "Major",
    "address": {
        "street": "7821 Spot Place",
        "city": "Centerville",
        "state": "OK",
        "country": "US"
    }
}

{
    "firstname": "Paulo",
    "lastname": "Santos",
    "address": {
        "street": "123 Maple Street",
        "city": "London",
        "state": "Ontario",
        "country": "CA"
    }
}
---
root
|-- phone: long
|-- affiliations: array
|    |-- element: string

{
    "phone": 19185550023,
    "affiliations": [
        "Example Dot Com",
        "Example Independent Research",
        "Example.io"
    ]
}

{
    "phone": 12175550181,
    "affiliations": [
        "General Anonymous Example Products",
        "Example Dot Com"
    ]
}
```

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

## \$1\$1call\$1\$1 (dfc,, frame\$1name BaseTransform, transformation\$1ctx = “”, \$1\$1base\$1kwargs)
<a name="aws-glue-api-crawler-pyspark-transforms-flat-map-__call__"></a>

Menerapkan sebuah transformasi untuk setiap `DynamicFrame` dalam sebuah koleksi dan meratakan hasilnya.
+ `dfc` — `DynamicFrameCollection` tempat untuk melakukan flatmap (wajib).
+ `BaseTransform` — Sebuah transformasi yang berasal dari `GlueTransform` untuk diterapkan ke setiap anggota koleksi (wajib).
+ `frame_name` — Nama argumen yang padanya elemen koleksi akan diberikan (wajib).
+ `transformation_ctx` — Sebuah string unik yang digunakan untuk mengidentifikasi informasi status (opsional).
+ `base_kwargs` — Argumen yang akan diberikan ke transformasi dasar (wajib).

Mengembalikan sebuah `DynamicFrameCollection` baru yang dibuat dengan menerapkan transformasi untuk setiap `DynamicFrame` dalam `DynamicFrameCollection` sumber.

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

Warisan dari `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-flat-map-name"></a>

Warisan dari `GlueTransform` [name](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-flat-map-describeArgs"></a>

Warisan dari `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-flat-map-describeReturn"></a>

Warisan dari `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-flat-map-describeTransform"></a>

Warisan dari `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-flat-map-describeErrors"></a>

Warisan dari `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-flat-map-describe"></a>

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