Helpers & syntax sugar for PySpark.
Helpers & syntax sugar for PySpark. There are several features to make your life easier:
- Definition of spark packages, external jars, UDFs and spark options within your code;
- Simplified reader/writer api for Cassandra, Elastic, MySQL, Kafka;
- Testing framework for spark applications.
More details could be found in the official documentation.
Sparkly itself is easy to install:
pip install sparkly
The tricky part is pyspark. There is no official distribution on PyPI. As a workaround we can suggest:
Use env variable PYTHONPATH to point to your Spark installation, something like:
Use our setup.py file for pyspark. Just add this to your requirements.txt:
Here in Tubular, we published pyspark to our internal PyPi repository.
Here is a small code snippet to show how to easily read Cassandra table and write its content to ElasticSearch index:
from sparkly import SparklySession class MySession(SparklySession): packages = [ 'datastax:spark-cassandra-connector:2.0.0-M2-s_2.11', 'org.elasticsearch:elasticsearch-spark-20_2.11:6.5.4', ] if __name__ == '__main__': spark = MySession() df = spark.read_ext.cassandra('localhost', 'my_keyspace', 'my_table') df.write_ext.elastic('localhost', 'my_index', 'my_type')
See the online documentation for more details.
To run tests you have to have docker and docker-compose installed on your system. If you are working on MacOS we highly recommend you to use docker-machine. As soon as the tools mentioned above have been installed, all you need is to run:
Supported Spark Versions
At the moment we support:
|sparkly >= 2.7 | Spark 2.4.x|
|sparkly 2.x | Spark 2.0.x and Spark 2.1.x and Spark 2.2.x|
|sparkly 1.x | Spark 1.6.x|
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