holoviz/holoviews v1.21.0

Version 1.21.0

on GitHub

This release adds support for sample information on hover for rasterized/datashaded plots, adds dendrogram plot, and adds logarithmic support for Histogram. Along with these new features, this release includes a number of enhancements, bug fixes, and improved documentation.
Many thanks to the new contributors @philipc2, @NolanBrb, and @sand-hanitizer, as well as the returning contributors @Azaya89, @LecrisUT, @maximlt, @michaelaye, @philippjfr, and @hoxbro.

This release bumps the minimum supported Python version to 3.10, deprecates the streamz interface, autoloading RC file, IPython magic, and using matplotlib as default backend for hv.extension which are all planned for removal in 1.23.0.

New features:

• Sample information on hover for rasterized/datashaded Bokeh plot (#6422, #6479, #6531, #6553, #6568, #6581, #6584, #6593, #6596, #6609)
• Add dendrogram plot (#6511, #6625, #6600)
• Add logarithmic support for Histogram (#6575)

Deprecations and removals:

• Minimum supported Python version is now 3.10 (#6549)
• Deprecate the streamz interface (planned removal in 1.23.0) (#6490)
• Deprecate autoloading RC file (planned removal in 1.23.0) (#6610)
• Deprecate IPython magic (planned removal in 1.23.0) (#6610)
• Deprecate hv.extension() for hv.extension("matplotlib") (planned removal in 1.23.0) (#6610)
• Remove unused hv.config parameters: future_deprecations and warn_options_call (#6610)

Enhancements:

• [Bokeh] Add hide_toolbar options (#6602)
• [Bokeh] Add radius and radius_dimension to Point plot (#6599, #6613)
• [Notebook] Add details option for AbbreviatedException (#6611)
• [Notebook] Improve the content displayed when loading the extension in a notebook (#6586)
• Add basic reactive expression support in a streams dictionary (#6563)
• Allow passing dimension as style mapping option #6614
• Support passing selection dictionary to Dataset.select (#6617, #6626)
• Pass the backend in holoviews.opts.defaults (#6331)
• Update norm function to handle edge case (#6366)

Performance:

• Defer Pandas import (#6476, #6574, #6582, #6585)
• Defer datashader.bundling to avoid numba compile time (#6616)
• Defer Panel and Pandas imports in IPython (#6570)

Fixes:

• Correctly apply Bars style transforms (#6623)
• Don't assume all extents are string in max_extents (#6571)
• Histogram error with datatype dask.array and backend Matplotlib (#6542)
• Wrong empty element when using apply_when (#6628)
• Add legend to distribution for matplotlib backend (#6544)
• Improve multi_y error for single element (#6543)
• PandasInterface.select with an index and a column (#6579)
• Skip overlay aggregate for NdOverlays with a count aggregator (#6619)

Documentation:

• Use numpydoc style for docstrings (#6506, #6556, #6583)
• Reduce warnings and apply fixes when building documentation (#6603, #6639)
• Small documentation corrections (#6539, #6604)
• Update documentation for plotting tools affected by the Bokeh 3.4 change (#6478)

Build:

• Add more project URLs to PyPI (#6629)
• Support PEP 639 - License Clarity (#6564)
• Support PEP 734 - Dependency Groups (#6608)