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IsEven class

The IsEven transform returns a Boolean value in a new column that indicates whether the source column or value is even. If the source column or value is a decimal, the result is false.

Example

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

sc = SparkContext()
spark = SparkSession(sc)

input_df = spark.createDataFrame(
    [(5,), (0,), (-1,), (2,), (None,)],
    ["source_column"],
)

try:
    df_output = math_functions.IsEven.apply(
        data_frame=input_df,
        spark_context=sc,
        source_column="source_column",
        target_column="target_column",
        value=None,
        true_string="Even",
        false_string="Not even",
    )
    df_output.show()
except:
    print("Unexpected Error happened ")
    raise
    

Output

The output will be:

```
+------------+------------+
|source_column|target_column|
+------------+------------+
| 5| Not even|
| 0| Even|
| -1| Not even|
| 2| Even|
| null| null|
+------------+------------+
```

The IsEven transformation takes the `source_column` as "source_column" and the `target_column` as "target_column". It checks if the value in the `"source_column"` is even or not. If the value is even, it sets the `"target_column"` value to the `true_string` "Even". If the value is odd, it sets the `"target_column"` value to the `false_string` "Not even". If the `"source_column"` value is `null`, the `"target_column"` value is set to `null`.

The transformation correctly identifies the even numbers (0 and 2) and sets the `"target_column"` value to "Even". For odd numbers (5 and -1), it sets the `"target_column"` value to "Not even". For the `null` value in `"source_column"`, the `"target_column"` value is set to `null`.

Methods

__call__(spark_context, data_frame, target_column, source_column=None, true_string=DEFAULT_TRUE_STRING, false_string=DEFAULT_FALSE_STRING, value=None)

The IsEven transform returns a Boolean value in a new column that indicates whether the source column or value is even. If the source column or value is a decimal, the result is false.

apply(cls, *args, **kwargs)

Inherited from GlueTransform apply.

name(cls)

Inherited from GlueTransform name.

describeArgs(cls)

Inherited from GlueTransform describeArgs.

describeReturn(cls)

Inherited from GlueTransform describeReturn.

describeTransform(cls)

Inherited from GlueTransform describeTransform.

describeErrors(cls)

Inherited from GlueTransform describeErrors.

describe(cls)

Inherited from GlueTransform describe.