3.19.0

2026-01-19

• Write Zarr v3 datasets with cf.write (#895)
• Read Zarr v2 and v3 datasets that contain a group hierarchy with cf.read (#894)
• Reduce the time taken to import cf (#902)
• New function to control the creation of cached elements during data display: cf.display_data (#913)
• New methods: cf.Data.get_cached_elements, cf.Data.cache_elements (#913)
• Set cached elements during cf.Data.__init__ (#913)
• Removed the cf.constants.CONSTANTS dictionary, replacing it with cf.ConstantAccess.constants (#902)
• Reduce the time taken to import cf (#902)
• New optional dependency: zarr>=3.1.3
• Changed dependency: cfdm>=1.13.0.0, <1.13.1.0

What's Changed

• Add three new recipes (21 - 23) by 2025 summer student by @sadielbartholomew in #900
• Docs: update description & preview image of cf-plot gallery by @sadielbartholomew in #901
• Reference training materials (& remove reference to 'the the'!) by @sadielbartholomew in #904
• Reduce the time taken to import cf by @davidhassell in #905
• Control setting and display of cached data elements by @davidhassell in #914
• Zarr write + Zarr groups by @davidhassell in #915
• Update hooks & workflows esp. to skip recipes with isort by @sadielbartholomew in #918
• Decouple recipes gallery from main docs build by @sadielbartholomew in #919
• Prepare release of v3.19.0 by @sadielbartholomew in #920

Full Changelog: v3.18.2...v3.19.0