NCAS-CMS/cf-python

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A CF-compliant Earth Science data analysis library

Stars: 150
Forks: 23
Open beginner issues: 0
Indexed issues: 131
Avg merge: 1d 11h
Merged PRs (30d): 2

Dominant language: Python
License: MIT
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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131 open issues indexed

Remove abandoned `cf.etc` directory Open

code tidy

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

NCAS-CMS/cf-python#969 · Opened Sep 10, 2026
Attempt at unsupported conservative 3D mesh regridding Open

bug?

NCAS-CMS/cf-python#968 · 1 assignee · Opened Sep 10, 2026
Release: migrate from deprecated build command Open

release

NCAS-CMS/cf-python#966 · 1 assignee · Opened Sep 8, 2026
Remove support for Python 3.10 (EOL) Open

enhancement

NCAS-CMS/cf-python#964 · 1 reaction · 1 assignee · Opened Aug 26, 2026
error from netCDF in cf.write Open

bug

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

NCAS-CMS/cf-python#960 · 10 comments · Opened Jul 23, 2026
Explicitly define public API with `__all__` Open

API review (4.0.0) documentation

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

NCAS-CMS/cf-python#958 · Opened Jul 16, 2026
Testing of to/from xarray Open

enhancement xarray

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

NCAS-CMS/cf-python#956 · Opened Jul 15, 2026
datetime support not working for cf.Data made from a scalar Open

bug?

Difficulty 3/5 1-2 days Newbie friendliness 55/100

NCAS-CMS/cf-python#955 · 5 comments · Opened Jun 15, 2026
Docs: remove old orphaned pages e.g. 'Collapse FAQs' Open

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

NCAS-CMS/cf-python#953 · Opened Jun 11, 2026
Function to calculate trajectory DSG field path length Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

NCAS-CMS/cf-python#946 · Opened Apr 16, 2026
Converting from kerchunk to CFA: fix or document behaviour Open

aggregation kerchunk

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

NCAS-CMS/cf-python#945 · Opened Apr 16, 2026
Convert schema-like objects to dataclasses Open

code tidy

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

NCAS-CMS/cf-python#943 · Opened Mar 26, 2026
Refactor semantic constants to enumerations Open

code tidy

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

NCAS-CMS/cf-python#942 · Opened Mar 26, 2026
How best to handle the default (Earth) radius constant Open

code tidy enhancement question

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

NCAS-CMS/cf-python#941 · Opened Mar 26, 2026
How to group by actual winter season Open

question

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

NCAS-CMS/cf-python#939 · 5 comments · Opened Mar 25, 2026
Read file-like object datasets Open

dataset read enhancement

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

NCAS-CMS/cf-python#937 · 1 reaction · Opened Mar 24, 2026
`pyfive` spams test suite STDOUT Open

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

NCAS-CMS/cf-python#928 · 1 comment · Opened Mar 5, 2026
New mixin method to consolidate normalisation of limits Open

code tidy enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

NCAS-CMS/cf-python#926 · Opened Feb 24, 2026
Support for Python 3.10? Open

bug?

Difficulty 3/5 1-2 days Newbie friendliness 55/100

NCAS-CMS/cf-python#921 · 2 comments · Opened Jan 23, 2026
Image comparison testing for any recipes with plots Open

documentation recipes testing

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

NCAS-CMS/cf-python#917 · 1 comment · Opened Jan 9, 2026
manipulating non-missing elements in a field Open

dask enhancement question

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

NCAS-CMS/cf-python#911 · 1 comment · Opened Dec 5, 2025
Code downloads from tutorial documentation do not work Open

bug documentation

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

NCAS-CMS/cf-python#907 · 1 comment · Opened Nov 13, 2025
Dependency checking with `importlib.metadata` Open

dependency enhancement

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

NCAS-CMS/cf-python#906 · 1 reaction · Opened Nov 12, 2025
Improve performance related to `cf.Field.autocylcic` Open

dataset read enhancement performance

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

NCAS-CMS/cf-python#903 · 1 reaction · Opened Oct 29, 2025
Implement hypot function Open

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

NCAS-CMS/cf-python#889 · 2 comments · 1 reaction · Opened Aug 15, 2025
Conda, dependency clash when installing cf-python and cf-plot alongside Jupyter. Open

installation

NCAS-CMS/cf-python#883 · 3 comments · 1 reaction · 1 assignee · Opened Aug 5, 2025
More comprehensive testing (coverage etc.) for cyclicity Open

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

NCAS-CMS/cf-python#853 · Opened Mar 10, 2025
Docs: new recipe to illustrate masking area shapefile Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

NCAS-CMS/cf-python#848 · Opened Feb 28, 2025
Clarify role of precision when specifying floats to `subspace` Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

NCAS-CMS/cf-python#847 · 1 comment · Opened Feb 28, 2025
Error in cf.write when writing UM data fields Open

question um/pp

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

NCAS-CMS/cf-python#838 · 12 comments · Opened Jan 7, 2025
Support subspacing to nearest neighbour of provided value Open

enhancement

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

NCAS-CMS/cf-python#835 · Opened Nov 21, 2024
collapse('time: mean', group=cf.Y()) fails when cf.field() contains unused coordinates? Open

bug

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

NCAS-CMS/cf-python#834 · 4 comments · Opened Nov 19, 2024
New function: `cf.cell_overlaps` Open

API review (4.0.0) enhancement work in in progress

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

NCAS-CMS/cf-python#824 · 1 comment · 1 reaction · Opened Oct 30, 2024
Investigate possibility to provide ARM(64) architecture build Open

enhancement

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

NCAS-CMS/cf-python#823 · Opened Oct 11, 2024
Error in read_record_data when processing 6-hourly UM data Open

question

Difficulty 4/5 3-5 days Newbie friendliness 28/100

NCAS-CMS/cf-python#817 · 4 comments · Opened Sep 30, 2024
3-d conservative regridding Open

enhancement

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

NCAS-CMS/cf-python#814 · 3 comments · Opened Sep 12, 2024
coordinate equality raises a stack trace instead of a False Open

question

Difficulty 3/5 1-2 days Newbie friendliness 42/100

NCAS-CMS/cf-python#806 · 1 comment · Opened Aug 27, 2024
Jasmin Open

question

Difficulty 2/5 1-3 hours Newbie friendliness 20/100

NCAS-CMS/cf-python#801 · 3 comments · Opened Aug 9, 2024
Most construct data wiped when unary operator taken of field Open

bug

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

NCAS-CMS/cf-python#797 · 2 comments · Opened Jul 19, 2024
Handling of DSG station data for big datasets Open

enhancement

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

NCAS-CMS/cf-python#796 · 1 reaction · Opened Jul 18, 2024
CFA Virtualisation using CMIP6 example data: Unable to aggregate Open

bug

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

NCAS-CMS/cf-python#793 · 9 comments · 1 reaction · Opened Jul 10, 2024
Docs: include a 'How do I...?' table to direct on common tasks Open

documentation

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

NCAS-CMS/cf-python#792 · Opened Jul 9, 2024
Provide numbered view of a `FieldList` Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 52/100

NCAS-CMS/cf-python#790 · 3 comments · 1 reaction · Opened Jul 8, 2024
`aggregate`: explicit feedback about un-aggregatable outcome Open

aggregation API review (4.0.0) enhancement

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

NCAS-CMS/cf-python#789 · 1 comment · Opened Jul 8, 2024
I am always struggling with dimensions, axes, and coordinates in cf-python - it seems that ChatGPT does too! Open

API review (4.0.0) question

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

NCAS-CMS/cf-python#788 · 9 comments · Opened Jul 4, 2024
Add type hints for type safety Open

code tidy enhancement testing

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

NCAS-CMS/cf-python#787 · 1 reaction · Opened Jun 18, 2024
hdf5 chunk defaults and handling Open

API review (4.0.0) enhancement

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

NCAS-CMS/cf-python#781 · 1 reaction · Opened Jun 5, 2024
Clarity in documentation and code around chunksizes Open

API review (4.0.0) enhancement

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

NCAS-CMS/cf-python#779 · 1 reaction · Opened Jun 3, 2024
API review for version 4.0.0: thoughts, ideas, linked Issues, etc. Open

API review (4.0.0) enhancement

Difficulty 5/5 Over a week Newbie friendliness 18/100

NCAS-CMS/cf-python#776 · 2 comments · Opened May 29, 2024
Unexpected behaviour comparing two views of the same data: pp and netcdf Open

bug um/pp

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

NCAS-CMS/cf-python#775 · 3 comments · 1 reaction · Opened May 28, 2024

NCAS-CMS/cf-python

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