Modin 0.22.0

This release includes support for pyhdk=0.6, a few performance enhancements,
new features and bug fixes.

Key Features and Updates Since 0.21.0

• Stability and Bugfixes
  • FIX-#6104: Stop selecting same column twice for repr (#6210)
  • FIX-#6199: make sure read_html return a list of DataFrames (#6200)
  • FIX-#6201: align groupby objects signatures with pandas (#6202)
  • FIX-#6212: Fix '.read_feather()' failure if the file contains index metadata (#6213)
  • FIX-#6216: make sure 'infer_objects' returns DataFrame (#6217)
  • FIX-#5722: Use full axis function when casting to "category" (#6222)
  • FIX-#5889: HDK: Combine multiple lazy concat operations into a single one and replace recursion with iteration (#5932)
• Performance enhancements
  • PERF-#6126: Remove redundant '.fillna(0)' at the end of '.size()' and '.count()' (#6127)
  • PERF-#6224: Use 'Map' operator to retrieve categorical codes (#6230)
• Refactor Codebase
  • REFACTOR-#5916: Align Python engine's API with other engines (#6214)
• New Features
  • FIX-#6189: Bump pyhdk version to 0.6 (#6190)
  • FEAT-#6225: Allow set_index to take an object to be handled by the backend (a backend index, etc) (#6228)
• Dependencies
  • FIX-#6072: unpin pyarrow and xfail test_read_parquet_pandas_index test (#6223)

Contributors

@mvashishtha
@AndreyPavlenko
@anmyachev
@dchigarev
@jkew
@YarShev