iiasa/ixmp4

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A data warehouse for high-powered scenario analysis in the domain of integrated assessment of climate change and energy systems modeling

Stars: 14
Forks: 8
Open beginner issues: 0
Indexed issues: 31

Dominant language: Python
License: MIT
Last GitHub push: Aug 7, 2026
Latest indexed: Sep 17, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

31 open issues indexed

ValueError: No group keys passed! with scalar Variable Open

bug

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

iiasa/ixmp4#267 · Opened Sep 14, 2026
Calculate run hash for unique identifier Open

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

iiasa/ixmp4#262 · Opened Aug 6, 2026
Require psycopq >=3.3 Open

help wanted

iiasa/ixmp4#261 · 1 comment · 1 reaction · 1 assignee · Opened Aug 3, 2026
Add suggested resolution to client and server version mismatch warning Open

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

iiasa/ixmp4#250 · Opened Jun 5, 2026
Simple initialisation to in-memory-platform Open

iiasa/ixmp4#246 · 1 assignee · Opened Jun 3, 2026
Support filtering by meta indicators Open

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

iiasa/ixmp4#225 · 1 reaction · Opened Apr 8, 2026
Investigate performance issue for datapoints with short time periods Open

question

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

iiasa/ixmp4#223 · Opened Dec 10, 2025
Improve performance of `Parameter.add_data()` (and similar) Open

enhancement

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

iiasa/ixmp4#221 · Opened Dec 10, 2025
Add functionality to clone Runs between Platforms Open

enhancement

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

iiasa/ixmp4#220 · Opened Nov 28, 2025
Filters in the facade layer Open

iiasa/ixmp4#217 · 1 comment · 1 assignee · Opened Nov 18, 2025
Invalid State of Timeseries Table breaks Run deletion Open

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

iiasa/ixmp4#216 · Opened Nov 18, 2025
Clarify user/authentication management for accessing shared MESSAGEix databases Open

question

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

iiasa/ixmp4#214 · 1 comment · Opened Nov 5, 2025
Check if `ixmp.backend.JDBCBackend.preload()` is required for performance parity Open

question

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

iiasa/ixmp4#213 · Opened Nov 5, 2025
ToDos before running MESSAGEix with ixmp4 Open

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

iiasa/ixmp4#212 · 2 comments · Opened Nov 5, 2025
Improve performance of `Run.clone()` Open

enhancement

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

iiasa/ixmp4#211 · 1 comment · Opened Nov 5, 2025
Add a `describe` feature to API endpoints Open

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

iiasa/ixmp4#189 · 3 comments · Opened Aug 7, 2025
Expand `run.clone()` tests Open

enhancement

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

iiasa/ixmp4#178 · Opened May 12, 2025
How should `constrained_to_indexsets=[]` be handled? Open

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

iiasa/ixmp4#175 · Opened May 6, 2025
Raise Exception in `IndexSetService.remove_data` if `remove_dependent_data=False` and linked data would be removed. Open

enhancement

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

iiasa/ixmp4#136 · 1 comment · Opened Nov 26, 2024
Safeguard `Run.remove_solution()` against removal of input data if a solution is present Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 50/100

iiasa/ixmp4#135 · Opened Nov 26, 2024
Make `<OptimizationItem>.data` a `pd.DataFrame` in the core layer Open

enhancement

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

iiasa/ixmp4#134 · Opened Nov 26, 2024
Improve performance of `Run.remove_solution()` Open

enhancement

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

iiasa/ixmp4#130 · Opened Nov 14, 2024
Add a convenience function for `ixmp.Scenario.solve()` functionality Open

enhancement

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

iiasa/ixmp4#120 · 1 comment · Opened Oct 3, 2024
Change plural form of column names to singular Open

enhancement

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

iiasa/ixmp4#102 · 3 comments · Opened Jul 11, 2024
Clean up top-level namespace Open

enhancement

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

iiasa/ixmp4#84 · Opened Apr 22, 2024
Insufficient permissions for public access ixmp4 platform Open

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

iiasa/ixmp4#73 · 1 comment · Opened Mar 20, 2024
Harmonize filter signatures Open

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

iiasa/ixmp4#72 · Opened Mar 20, 2024
Pandas will make Copy-on-Write default behaviour with 3.0 Open

enhancement

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

iiasa/ixmp4#63 · Opened Mar 13, 2024
Support filtering by list with wildcard Open

enhancement

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

iiasa/ixmp4#32 · Opened Nov 23, 2023
Create ixmp4 version of transport tutorial Open

iiasa/ixmp4#13 · 1 assignee · Opened Aug 31, 2023
Enable running the transport tutorial Open

iiasa/ixmp4#12 · 1 comment · 1 assignee · Opened Aug 31, 2023

iiasa/ixmp4

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