ipython/traitlets

View on GitHub

A lightweight Traits like module

Stars: 653
Forks: 217
Open beginner issues: 0
Indexed issues: 99
Avg merge: 2d 21h
Merged PRs (30d): 2

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

Open All

99 open issues indexed

traitlets.py Type validate method ate what would have been a valuable error message to see Open

ipython/traitlets#541 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Traitlets validates default even if overrided Open

ipython/traitlets#548 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Better insight on dictionary of traits instantiation Open

ipython/traitlets#549 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
new release for 5.x to address a SyntaxWarning? (Edit: also 4.3.x) Open

ipython/traitlets#604 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Generate manpage from configuration options Open

ipython/traitlets#636 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
argv parsing in 5.x to pass a set, how to Open

ipython/traitlets#640 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Support setting a link on traits Open

ipython/traitlets#641 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Issue parsing a single instance of TagRemovePreprocessor Open

ipython/traitlets#645 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Static typing Open

good first issue

ipython/traitlets#647 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add toml support Open

ipython/traitlets#648 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 17, 2026
short flags Open

ipython/traitlets#666 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
How to set globally a tag? Open

ipython/traitlets#682 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
min and max arguments to Int() not documented. Open

ipython/traitlets#689 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Discussion: optionally restoring argparse nargs/multiplicity support Open

ipython/traitlets#690 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Add support for firing one-time events when observing Open

ipython/traitlets#691 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Editable installs broken with pip 22.1 Open

ipython/traitlets#725 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
If the default value for Unicode is traitlets.Undefined, then why is it type string when tested? How can you enforce CLI definition of an attribute if it self-massages to ""? Open

ipython/traitlets#732 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
docs: document `log` trait on `Application` class Open

ipython/traitlets#755 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Notifying a trait with a DataFrame instance throws Value Error Open

ipython/traitlets#756 · 3 comments · 2 reactions · 0 assignees · Indexed Sep 17, 2026
docs do not mention if loading application data from config files is a security risk or not Open

ipython/traitlets#765 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Should we open a discussions tab in this github? Open

ipython/traitlets#766 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`TraitType.make_dynamic_default` is not mentioned in the docs Open

ipython/traitlets#787 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
`UseEnum` does not work with str enum Open

ipython/traitlets#827 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
How to create required CLI config options? Open

ipython/traitlets#828 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
breaking change: __all__ limits what is exported Open

ipython/traitlets#831 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Confused about self.parent Open

ipython/traitlets#840 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
[error]You can use 'hmac-sha256' instead of '"hmac-sha256"' if you require traitlets >=5 Open

ipython/traitlets#846 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Application.load_config_file loads all files with same basename as given file Open

ipython/traitlets#850 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Pyright diagnostic type incompatible Open

ipython/traitlets#853 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Is there a way to only show base "--help" for explicitly defined options? Open

ipython/traitlets#854 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Consider using mypyc Open

enhancement

ipython/traitlets#864 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Promise not to remove Sentinel? Open

ipython/traitlets#865 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Singletons configurable allow multiple instances Open

ipython/traitlets#867 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Fix License metadata in PyPi package Open

ipython/traitlets#870 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
More typing edge cases Open

ipython/traitlets#871 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
execution order of trait observers Open

ipython/traitlets#874 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
5.13.0: pytest is failing with error in tests/test_typing.py Open

ipython/traitlets#889 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Obeserve not works when showing result in widgets.Output() Open

ipython/traitlets#898 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
26 tests fail Open

ipython/traitlets#901 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
in get_type_hints(Appliction), TypeError: <class 'traitlets.traitlets.Dict'> is not a generic class Open

ipython/traitlets#904 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 17, 2026
unobserve is not listed in the API in read the docs Open

ipython/traitlets#905 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Should there be a way to disable trait notifications? Open

ipython/traitlets#907 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 17, 2026
Collating list traits fails when only one is given - regression in traitlets 5.13.0 Open

ipython/traitlets#908 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Investigate PEP-703 python 3.13t free-threading Open

ipython/traitlets#916 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
traitlets Dict with per_key_traits should be more specific in a TraitError Open

ipython/traitlets#920 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
traitlets Dict should support a strict keys mode Open

ipython/traitlets#921 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
traitlets Dict does not observe value changes after initial key / value assigments Open

ipython/traitlets#922 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 17, 2026
Configurable should warn on unrecognized arguments Open

ipython/traitlets#926 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026
traitlets.Set should support generic type annotations for type safety Open

ipython/traitlets#927 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 17, 2026

ipython/traitlets

Get new issues in your inbox