pyspark-bucketmap 0.0.5

Description:

pysparkbucketmap 0.0.5

pyspark-bucketmap

pyspark-bucketmap is a tiny module for pyspark which allows you to bucketize DataFrame rows and map their values easily.
Install
pip install pyspark-bucketmap

Usage
from pyspark.sql import Row

people = spark.createDataFrame(
[
Row(age=12, name="Damian"),
Row(age=15, name="Jake"),
Row(age=18, name="Dominic"),
Row(age=20, name="John"),
Row(age=27, name="Jerry"),
Row(age=101, name="Jerry's Grandpa"),
]
)
people

Now, what we would like to do, is map each person's age to an age category.



age range
life phase




0 to 12
Child


12 to 18
Teenager


18 to 25
Young adulthood


25 to 70
Adult


70 and beyond
Elderly



We can use pyspark-bucketmap for this. First, define the splits and mappings:
from typing import List

splits: List[float] = [-float("inf"), 0, 12, 18, 25, 70, float("inf")]
mapping: Dict[int, Column] = {
0: lit("Not yet born"),
1: lit("Child"),
2: lit("Teenager"),
3: lit("Young adulthood"),
4: lit("Adult"),
5: lit("Elderly"),
}

Then, apply BucketMap.transform(df):
from pyspark_bucketmap import BucketMap
from typing import List, Dict

bucket_mapper = BucketMap(
splits=splits, mapping=mapping, inputCol="age", outputCol="phase"
)
phases_actual: DataFrame = bucket_mapper.transform(people).select("name", "phase")
phases_actual.show()




name
phase




Damian
Teenager


Jake
Teenager


Dominic
Young adulthood


John
Young adulthood


Jerry
Adult


Jerry's Grandpa
Elderly



Success!
✨
API
Module pyspark_bucketmap:
from pyspark.ml.feature import Bucketizer
from pyspark.sql import DataFrame
from pyspark.sql.column import Column

class BucketMap(Bucketizer):
mapping: Dict[int, Column]

def __init__(self, mapping: Dict[int, Column], *args, **kwargs):
...

def transform(self, dataset: DataFrame, params: Optional[Any] = None) -> DataFrame:
...

Contributing
Under the hood, uses a combination of pyspark's Bucketizer and pyspark.sql.functions.create_map. The code is 42 lines and exists 1 in file: pyspark_bucketmap.py. To contribute, follow your preferred setup option below.
Option A: using a Devcontainer (VSCode only)
If you happen to use VSCode as your editor, you can open fseval in a Devcontainer. Devcontainers allow you to develop inside a Docker container - which means all dependencies and packages are automatically set up for you. First, make sure you have the Remote Development extension installed.
Then, you can do two things.


Click the following button:



Or, clone and open up the repo in VSCode:
git clone https://github.com/dunnkers/pyspark-bucketmap.git
code pyspark-bucketmap

(for this to work, make sure you activated VSCode's code CLI)
Then, you should see the following notification:



Now you should have a fully working dev environment working 🙌🏻. You can run tests, debug code, etcetera. All dependencies are automatically installed for you.
🙌🏻
Option B: installing the dependencies manually
Clone the repo and install the deps:
git clone https://github.com/dunnkers/pyspark-bucketmap.git
cd pyspark-bucketmap
pip install -r .devcontainer/requirements.txt
pip install -r .devcontainer/requirements-dev.txt
pip install .

Make sure you also have the following installed:

Python 3.9
OpenJDK version 11

Now, you should be able to run tests 🧪:
pytest .

🙌🏻
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Created by Jeroen Overschie © 2022.