lasp/cdflib

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A python module for reading and writing NASA's Common Data Format (cdf) files

Stars: 92
Forks: 47
Open beginner issues: 4
Indexed issues: 67

Dominant language: Python
License: MIT
Last GitHub push: Jun 1, 2026
Latest indexed: Sep 18, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

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Varget crashes when retrieving a field containing virtual records Open

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

lasp/cdflib#345 · Opened Sep 18, 2026
NumPy 2.5 causes segfault and datetime overflow during CDF/xarray conversion Open

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

lasp/cdflib#343 · Opened Aug 19, 2026
Add pandas 3 support Open

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

lasp/cdflib#342 · 4 comments · Opened Aug 14, 2026
ResourceWarnings when opening file-level-compressed CDFs under Python 3.14 Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

lasp/cdflib#341 · Opened Aug 6, 2026
cdf_to_xarray<->xarray_to_cdf can make a corrupted file Open

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

lasp/cdflib#340 · 1 comment · Opened Jul 28, 2026
cdfepoch.breakdown_tt2000 returns different results for scalar vs array Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

lasp/cdflib#339 · 1 comment · Opened Jul 4, 2026
TT2000 to unixtime conversion fails at leap second Open

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

lasp/cdflib#338 · Opened Jul 4, 2026
Deprecation warning raised with numpy 2.5.dev in epochs Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

lasp/cdflib#333 · Opened May 20, 2026
DELTA_PLUS_VAR/DELTA_MINUS_VAR for support_data? Open

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

lasp/cdflib#331 · Opened May 15, 2026
cdflib.cdfread.CDF() reads illegal paths built from legal paths with characters appended to it Open

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

lasp/cdflib#328 · Opened Apr 22, 2026
FILLVAL Bug? Open

Bug

lasp/cdflib#325 · 4 comments · 1 assignee · Opened Dec 9, 2025
Fix Remote Data Github Actions Open

Testing Suite

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

lasp/cdflib#324 · Opened Nov 24, 2025
Potential bug with zero length variables? Open

Bug

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

lasp/cdflib#323 · Opened Nov 24, 2025
Add final touches to be compliant with PyHC Open

Docs

Difficulty 2/5 Half a day Newbie friendliness 35/100

lasp/cdflib#322 · Opened Nov 24, 2025
Create some tests to use as a performance benchmark Open

Performance

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

lasp/cdflib#321 · Opened Nov 24, 2025
Add a check that DEPEND_0/1/2/3/etc is actually a string. Open

Bug

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

lasp/cdflib#320 · Opened Nov 24, 2025
Bug with writing empty global attrs Open

Bug

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

lasp/cdflib#319 · Opened Nov 24, 2025
Fix scenarios where a variables points to itself Open

Bug

lasp/cdflib#317 · 1 assignee · Opened Nov 17, 2025
CDF Load adds DEPEND_1 for non-epoch variable Open

Bug

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

lasp/cdflib#316 · Opened Oct 22, 2025
Cast attributes to string if user specifies string Open

New feature

lasp/cdflib#315 · 1 assignee · Opened Oct 21, 2025
varget/vdr_info uses case insensitive variable name comparisons Open

Bug

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

lasp/cdflib#314 · Opened Oct 9, 2025
Convert in-memory cdflib.CDF into xarray? Open

New feature

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

lasp/cdflib#312 · Opened Sep 12, 2025
Bug - Divide by zero error writing compressed empty variable Open

Bug

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

lasp/cdflib#311 · Opened Sep 10, 2025
Fix all # type: ignore in the code Open

Testing Suite

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

lasp/cdflib#310 · Opened Aug 5, 2025
Do not compress "epoch" variable in xarray_to_cdf Open

Bug

lasp/cdflib#306 · 2 comments · 1 assignee · Opened Jul 8, 2025
Add range checks for the time conversions Open

New feature

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

lasp/cdflib#305 · 1 comment · Opened Jul 1, 2025
Do Label variables need a DEPEND_1? Open

Bug

lasp/cdflib#304 · 1 comment · 1 assignee · Opened Jun 25, 2025
Remove len != 0 check in cdf_to_xarray._determin_record_dimensions Open

Bug

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

lasp/cdflib#303 · 1 comment · Opened Jun 5, 2025
3D arrays (and higher dimensions) written (or read?) differently to CDFs with column majority Open

Bug

lasp/cdflib#301 · 1 comment · 1 assignee · Opened Mar 6, 2025
Default row/column majority differs from documentation Open

Bug

lasp/cdflib#300 · 1 assignee · Opened Mar 6, 2025
Update sample usage of writer class Open

Docs

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

lasp/cdflib#299 · 1 comment · Opened Jan 29, 2025
Add a check in cdf_to_xarray to ensure DEPEND_X types are string Open

New feature

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

lasp/cdflib#297 · Opened Jan 28, 2025
REVISITED - df.cdfepoch.encode_tt2000 and cdf.cdfepoch.breakdown_tt2000 - unexpected return values during or just after leap second Open

lasp/cdflib#296 · 1 assignee · Opened Jan 21, 2025
Make a unit test for the bug with TT2000 conversions. Open

Testing Suite

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

lasp/cdflib#293 · Opened Jan 15, 2025
Determine how to handle "write_var" with incorrect dimension sizes Open

Bug

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

lasp/cdflib#291 · Opened Jan 15, 2025
Add a unit test to catch the errors with dimensions of size 1 being read in incorrectly by cdf_to_xarray Open

Bug

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

lasp/cdflib#290 · Opened Jan 14, 2025
Investigate all dynamically set sections of the cdf file when writing Open

Bug

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

lasp/cdflib#288 · Opened Jan 13, 2025
CDF_TIME_TT2000 should not include leap seconds Open

Bug

Difficulty 1/5 Under an hour Newbie friendliness 50/100

lasp/cdflib#283 · Opened Jan 3, 2025
Use fsspec for opening files on s3 etc Open

New feature

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

lasp/cdflib#282 · 2 comments · Opened Dec 5, 2024
Support for RLE, HUFF and AHUFF compression? Open

New feature

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

lasp/cdflib#280 · 1 comment · Opened Oct 31, 2024
cdf_to_xarray to_netcdf fails with ValueError Open

Bug

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

lasp/cdflib#276 · 2 comments · Opened Sep 11, 2024
aioboto3 package dependency/install Open

New feature

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

lasp/cdflib#270 · 1 reaction · Opened Jun 28, 2024
cdfread.CDF globalattsget() return format not expected. attributes format conflict between cdfwrite and cdfread Open

Bug

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

lasp/cdflib#269 · Opened Jun 18, 2024
monotonically increasing check should be ">=" Open

Bug

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

lasp/cdflib#266 · 3 comments · Opened Jun 7, 2024
Add a flag to not include things like "standard_name" in the cdf_to_xarray conversion Open

New feature

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

lasp/cdflib#264 · Opened Jun 7, 2024
When checking if EPOCH is monotonically increasing, check the attribute flag MONOTON Open

Bug

lasp/cdflib#263 · 1 assignee · Opened Jun 7, 2024
When checking attributes in the xarray<->cdf stuff, don't check True/False. Instead check if attribute_value is None. Open

Bug

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

lasp/cdflib#262 · Opened Jun 7, 2024
In cdfwrite, don't cancel writing the global attributes if we encounter an error with one attribute Open

New feature

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

lasp/cdflib#261 · Opened Jun 7, 2024
Add checks for "None" in the global attributes in xarray_to_cdf Open

Bug

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

lasp/cdflib#260 · Opened Jun 7, 2024
globalattsget() returns lists for everything, even scalar values Open

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

lasp/cdflib#240 · Opened Apr 4, 2024

lasp/cdflib

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