awswrangler 0.0b31

Utility belt to handle data on AWS.

AWS Data Wrangler (beta)

Utility belt to handle data on AWS.

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Contents: Use Cases | Installation | Examples | Diving Deep

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Use Cases

• Pandas -> Parquet (S3)
• Pandas -> CSV (S3)
• Pandas -> Glue Catalog
• Pandas -> Athena
• Pandas -> Redshift
• CSV (S3) -> Pandas (One shot or Batching)
• Athena -> Pandas (One shot or Batching)
• PySpark -> Redshift
• Delete S3 objects (parallel :rocket:)

Installation

pip install awswrangler

Runs only with Python 3.6 and beyond.

Runs anywhere (AWS Lambda, AWS Glue, EMR, EC2, on-premises, local, etc).

P.S. Lambda Layer bundle and Glue egg are available to download. It's just upload to your account and run! :rocket:

Examples

Writing Pandas Dataframe to S3 + Glue Catalog

session = awswrangler.Session()
session.pandas.to_parquet(
    dataframe=dataframe,
    database="database",
    path="s3://...",
    partition_cols=["col_name"],
)

If a Glue Database name is passed, all the metadata will be created in the Glue Catalog. If not, only the s3 data write will be done.

Reading from AWS Athena to Pandas

session = awswrangler.Session()
dataframe = session.pandas.read_sql_athena(
    sql="select * from table",
    database="database"
)

Reading from AWS Athena to Pandas in chunks (For memory restrictions)

session = awswrangler.Session()
dataframe_iter = session.pandas.read_sql_athena(
    sql="select * from table",
    database="database",
    max_result_size=512_000_000  # 512 MB
)
for dataframe in dataframe_iter:
    print(dataframe)  # Do whatever you want

Reading from S3 (CSV) to Pandas

session = awswrangler.Session()
dataframe = session.pandas.read_csv(path="s3://...")

Reading from S3 (CSV) to Pandas in chunks (For memory restrictions)

session = awswrangler.Session()
dataframe_iter = session.pandas.read_csv(
    path="s3://...",
    max_result_size=512_000_000  # 512 MB
)
for dataframe in dataframe_iter:
    print(dataframe)  # Do whatever you want

Typical Pandas ETL

import pandas
import awswrangler

df = pandas.read_...  # Read from anywhere

# Typical Pandas, Numpy or Pyarrow transformation HERE!

session = awswrangler.Session()
session.pandas.to_parquet(  # Storing the data and metadata to Data Lake
    dataframe=dataframe,
    database="database",
    path="s3://...",
    partition_cols=["col_name"],
)

Loading Pyspark Dataframe to Redshift

session = awswrangler.Session(spark_session=spark)
session.spark.to_redshift(
    dataframe=df,
    path="s3://...",
    connection=conn,
    schema="public",
    table="table",
    iam_role="IAM_ROLE_ARN",
    mode="append",
)

Deleting a bunch of S3 objects

session = awswrangler.Session()
session.s3.delete_objects(path="s3://...")

Diving Deep

Pandas to Redshift Flow

Spark to Redshift Flow