NCAS-CMS/cfdm

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A Python reference implementation of the CF data model

Stars: 31
Forks: 13
Open beginner issues: 0
Indexed issues: 43
Avg merge: 7d 22h
Merged PRs (30d): 1

Dominant language: Python
License: MIT
Last GitHub push: Sep 9, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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43 open issues indexed

Conformance: UGRID check failure reporting missing attr Open

bug UGRID

NCAS-CMS/cfdm#432 · 1 assignee · Opened Sep 18, 2026
Apply `match/case` in `netcdf.cf_resolve_references` logic Open

code tidy/refactor

NCAS-CMS/cfdm#431 · 1 assignee · Opened Sep 11, 2026
`read`: case-insensitive `dataset_type` & `backend` specs Open

dataset read enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

NCAS-CMS/cfdm#430 · Opened Sep 11, 2026
`to_xarray` for time coords beyond `np.datetime64[ns]` Open

bug?

NCAS-CMS/cfdm#429 · 1 assignee · Opened Sep 10, 2026
Remove support for Python 3.10 (EOL) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NCAS-CMS/cfdm#427 · 1 reaction · Opened Aug 26, 2026
Explicitly define public API with `__all__` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

NCAS-CMS/cfdm#412 · 1 reaction · Opened Jul 16, 2026
Bug: Can't cf.read('https://psl.noaa.gov/thredds/fileServer/Datasets/gistemp/landmask_2deg.nc') Open

bug?

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NCAS-CMS/cfdm#405 · Opened May 21, 2026
Consider loading example field data arrays from file e.g. `.npz` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

NCAS-CMS/cfdm#396 · 3 comments · Opened Mar 19, 2026
Cell methods: Handle cell methods that apply to norm ancillary variables (CF-1.13) Open

data model enhancement new in CF-1.13

Difficulty 5/5 Over a week Newbie friendliness 35/100

NCAS-CMS/cfdm#374 · 1 reaction · Opened Dec 22, 2025
Cell methods: Handle the more general CF convention for statistics applying to portions of cells Open

data model enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

NCAS-CMS/cfdm#369 · 1 comment · 1 reaction · Opened Nov 19, 2025
Compliance reporting: standard name compatibility of units Open

conformance enhancement

NCAS-CMS/cfdm#367 · 1 assignee · Opened Nov 7, 2025
Dependency checking with `importlib.metadata` Open

dependency enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

NCAS-CMS/cfdm#364 · 2 comments · 1 reaction · Opened Nov 4, 2025
Consider whether or not the new Dask v2025.01.0 `optimize_slices` can replace `cfdm.Data.mixin.IndexMixin` Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

NCAS-CMS/cfdm#314 · 1 comment · Opened Jan 12, 2025
Initiation of a Domain Axis: clarify `source` API compat. & fix `size` Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

NCAS-CMS/cfdm#311 · 2 comments · Opened Aug 28, 2024
Add type hints for type safety Open

code tidy/refactor enhancement testing

Difficulty 4/5 3-5 days Newbie friendliness 25/100

NCAS-CMS/cfdm#305 · 1 reaction · Opened Jun 18, 2024
Prepare for UGRID versions greater than 1.0 Open

bug code tidy/refactor UGRID

NCAS-CMS/cfdm#301 · 1 assignee · Opened May 30, 2024
`default_version` arg. to `NetCDFRead.read` not exposed: remove? Open

code tidy/refactor dataset read question

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#298 · 5 comments · Opened May 22, 2024
Error reading files with pattern-defying CF Conventions value format Open

bug dataset read

NCAS-CMS/cfdm#295 · 1 assignee · Opened May 17, 2024
Unexpected attribute value after `write` setting older `Conventions` Open

bug question

Difficulty 3/5 1-2 days Newbie friendliness 45/100

NCAS-CMS/cfdm#294 · 2 comments · Opened May 17, 2024
runtime warning from numpy about invalid value in cast Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

NCAS-CMS/cfdm#293 · 12 comments · Opened Mar 23, 2023
Document accepted argument types for `source` parameters Open

code tidy/refactor documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NCAS-CMS/cfdm#229 · Opened Nov 10, 2022
Slight change in `_FillValue` property value on write-read Open

bug dataset read dataset write

Difficulty 3/5 1-2 days Newbie friendliness 25/100

NCAS-CMS/cfdm#225 · Opened Oct 31, 2022
Zero values reported by `repr` on fully-masked datetime arrays Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

NCAS-CMS/cfdm#224 · Opened Oct 31, 2022
Duplicate initialisation message codes in `NetCDFRead` Open

dataset read question

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

NCAS-CMS/cfdm#185 · Opened May 18, 2022
Consider string-like data equal despite different data type Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NCAS-CMS/cfdm#172 · Opened Jan 21, 2022
Subsampled coordinates (2: writing to disk) Open

compression dataset write enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NCAS-CMS/cfdm#169 · 1 reaction · Opened Dec 21, 2021
Enable plotting of cfdm fields with cfplot Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

NCAS-CMS/cfdm#166 · Opened Dec 17, 2021
Append mode: address netCDF group attributes limitation Open

dataset write

Difficulty 5/5 Over a week Newbie friendliness 20/100

NCAS-CMS/cfdm#142 · Opened May 13, 2021
Append mode: address domain ancillary limitation Open

dataset write

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#141 · Opened May 13, 2021
Software quality checklist evaluation for 5/5 FAIR score Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

NCAS-CMS/cfdm#131 · Opened Mar 31, 2021
Mapping of metadata-only CDL to field constructs Open

dataset read

Difficulty 5/5 Over a week Newbie friendliness 20/100

NCAS-CMS/cfdm#128 · Opened Mar 26, 2021
NetCDF string length dimension name methods Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

NCAS-CMS/cfdm#127 · 1 comment · Opened Mar 25, 2021
Accurate and doctest-able `cfdm.core` docstring examples Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#123 · 1 comment · Opened Mar 5, 2021
`ordered` errors for all but cell method constructs Open

code tidy/refactor documentation question

Difficulty 4/5 3-5 days Newbie friendliness 35/100

NCAS-CMS/cfdm#122 · 5 comments · Opened Feb 26, 2021
Reconsider treatment of external cell measures Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

NCAS-CMS/cfdm#110 · 1 comment · Opened Dec 18, 2020
Docs: drop-down menu for same-page version switching Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#106 · 1 reaction · Opened Nov 26, 2020
Custom exceptions Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#77 · Opened Sep 15, 2020
Further documentation on creating fields and writing fields to file Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 38/100

NCAS-CMS/cfdm#53 · 5 comments · 1 reaction · Opened Jun 19, 2020
Workflow for, & documenting of, conda installation Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 25/100

NCAS-CMS/cfdm#46 · Opened Jun 16, 2020
Revise NetCDFRead messaging & _code{0, 1} class vars Open

code tidy/refactor dataset read

Difficulty 5/5 Over a week Newbie friendliness 25/100

NCAS-CMS/cfdm#41 · 1 comment · Opened Jun 12, 2020
Logging enhancements Open

enhancement

NCAS-CMS/cfdm#35 · 1 assignee · Opened May 19, 2020
Docs: out-of-date warning on older versions Open

documentation

NCAS-CMS/cfdm#28 · 2 comments · 1 assignee · Opened Apr 24, 2020
Tests: sed setup lines invalid on Mac OS Open

testing

Difficulty 1/5 Under an hour Newbie friendliness 45/100

NCAS-CMS/cfdm#25 · 7 comments · Opened Apr 20, 2020

NCAS-CMS/cfdm

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