cfdm: A Python reference implementation of the CF data model

Published June 29, 2026 | Version 1.13.2.0

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A Python reference implementation of the CF data model.

Technical info (English)

New methods to convert to xarray: cfdm.Field.to_xarray and cfdm.Domain.to_xarray (https://github.com/NCAS-CMS/cfdm/issues/394)
New output format for cfdm.write that creates an xarray dataset in memory: 'XARRAY' (https://github.com/NCAS-CMS/cfdm/issues/394)
Improved and restructured output of cfdm.Field.dataset_compliance for (at present, preliminary) CF compliance checking, also available through a new keyword parameter to cfdm.read: _noncompliance_report (https://github.com/NCAS-CMS/cfdm/issues/365, https://github.com/NCAS-CMS/cfdm/issues/366)
Fix bug in cfdm.read that prevented some OPeNDAP URLS being read (https://github.com/NCAS-CMS/cfdm/issues/406)
Fix bug in cfdm.write when writing numpy scalars as Zarr attributes (https://github.com/NCAS-CMS/cfdm/issues/408)
New optional dependency: xarray>=2026.2.0

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European Commission
IS-ENES3 - Infrastructure for the European Network for Earth System modelling - Phase 3 824084
European Commission
SEACHANGE - Sea-level change due to climate change 247220
European Commission
Couplet - Transient climate change in the coupled atmosphere--ocean system 786427
UK Research and Innovation
Addressing the Grand Challenge of regional sea level change prediction NE/R000727/1

Hassell et al., (2020). cfdm: A Python reference implementation of the CF data model. Journal of Open Source Software, 5(54), 2717, https://doi.org/10.21105/joss.02717