NCAS-CMS/pyfive

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A pure Python HDF5 file reader

Stars: 104
Forks: 28
Open beginner issues: 0
Indexed issues: 10
Avg merge: 22h 47m
Merged PRs (30d): 6

Dominant language: Python
License: BSD-3-Clause
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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10 open issues indexed

difference in check_dtype for vlen compared to h5py Open

question

NCAS-CMS/pyfive#228 · 13 comments · 2 assignees · Opened May 8, 2026
Datasets not truly independent from files on remote file systems. Open

question

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

NCAS-CMS/pyfive#219 · 1 comment · Opened Apr 6, 2026
Policy for AI written code - please comment! Open

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

NCAS-CMS/pyfive#215 · 5 comments · Opened Apr 1, 2026
Chunk index logged as rebuilt on every var access for the same variable Open

optimisation

NCAS-CMS/pyfive#206 · 1 assignee · Opened Mar 22, 2026
HDF5 V2.0 Open

enhancement

NCAS-CMS/pyfive#156 · 1 comment · 1 assignee · Opened Dec 3, 2025
Pyfive VirtualiZarr Parser? Open

enhancement

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

NCAS-CMS/pyfive#155 · 1 comment · 3 reactions · Opened Nov 18, 2025
Create a `RELEASE.md` that gives a checklist of actions needed for a public release Open

release

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

NCAS-CMS/pyfive#150 · 3 comments · 1 reaction · Opened Nov 13, 2025
Usage of ancient files for testing breaks with recent h5py/libhdf5 Open

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

NCAS-CMS/pyfive#108 · 7 comments · Opened Oct 1, 2025
Scale/Offset (and maybe other?) Filters Open

enhancement

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

NCAS-CMS/pyfive#89 · 4 comments · Opened Aug 21, 2025
numpy arrays read from attributes are not writable Open

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

NCAS-CMS/pyfive#53 · 5 comments · Opened May 13, 2022

NCAS-CMS/pyfive

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