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Bodo 2021.4 Release (Date: 4/19/2021)

This release includes many new features, bug fixes and usability improvements. Overall, 98 code patches were merged since the last release.

New Features and Improvements

  • Bodo is available for Windows as a Conda package (similar to Linux and macOS)

  • Removed boost library dependency

  • Many improvements to error checking and reporting, including:

    • Internal compiler errors and stack traces are now avoided more effectively (clear errors are thrown)
    • Ensure that an error is thrown if user specifies an argument as distributed but it must be replicated
    • Improvements in error checking for user-defined functions (UDFs)
  • Connectors:

    • Support for writing partitioned Parquet datasets (df.to_parquet with partition_cols parameter)
    • Support for S3 anonymous access with storage_options={"anon": True} in pd.read_parquet()
    • Parquet read: optimized metadata collection for nested parquet directories (includes hive-partitioned dataset)
    • To reduce Parquet read time, schema validation of multi-file parquet datasets can be disabled with bodo.parquet_validate_schema=False
  • Reduced compilation time for Pandas APIs

  • Improved compilation time for df.head/tail

  • Support for format spec in f-strings, for example: f"{a:0.0%}"

  • Support for arrays in bodo.rebalance()

  • Pandas coverage:

    • Support for df.filter for filtering columns
    • Support for indicator=True in pd.merge()
    • Support for DataFrame/Series/GroupBy.pipe()
    • Support for setting dataframe columns using a 2D array
    • Support for string and nullable arrays (e.g. pd.Int64Dtype) in DataFrame/Series.shift()
    • Support for pandas.tseries.offsets.MonthBegin
    • Series.where and Series.mask: support for nullable arrays (e.g. pd.Int64Dtype)
  • Scikit-learn:

    • Support for sklearn.ensemble.RandomForestRegressor