fix: tolerate IPython 9.x changes (color API + print_stack_entry signature) #72
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nicovank
reviewed
Oct 6, 2025
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| # IPython ≤ 8.x accepts 'context='; IPython 9.x removed it. | ||
| try: | ||
| self.print_stack_entry(frame_lineno, context=context) | ||
| except TypeError: | ||
| # Fallback for IPython 9.x (no 'context' kwarg) | ||
| self.print_stack_entry(frame_lineno) |
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Just update pyproject.toml, set the minimum version for IPython to 9, and keep only one version for this code.
I am curious, can you share what's the difference in output between these two versions?
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| def _resolve_colors(self): | ||
| """ | ||
| Return a colors object compatible with what ChatDBG expects. | ||
| - Honors CHATDBG_NO_COLOR=1 (no ANSI escapes). | ||
| - Tries legacy IPython color internals (≤ 8.x). | ||
| - Falls back safely for IPython 9+ where internals moved/changed. | ||
| """ | ||
| # Allow users/CI to force no color | ||
| if os.getenv("CHATDBG_NO_COLOR") == "1": | ||
| return types.SimpleNamespace(excName="", Normal="") | ||
| # Try legacy IPython path (works on IPython ≤ 8.x) | ||
| try: | ||
| # Some environments may still provide active_colors | ||
| return self.color_scheme_table.active_colors # noqa: attribute-defined-outside-init | ||
| except Exception: | ||
| # Safe fallback for IPython 9+ (no color) | ||
| return types.SimpleNamespace(excName="", Normal="") |
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So colors don't work anymore with the latest IPython versions? Hmmmm, not a fan. Wonder what a workaround could be.
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Closes #62
Problem
Upgrading to IPython 9.x changed debugger internals:
self.color_scheme_table.active_colorswas removed.Pdb.print_stack_entry()no longer acceptscontext=.Both changes caused ChatDBG to crash during prompt building and
whyexecution.Fix
_resolve_colors():CHATDBG_NO_COLOR=1for CI/no-ANSI setups.color_scheme_table.active_colorspath.print_stack_entry(..., context=context)intry/except TypeErrorto support both IPython 8 and 9.
Validation
✅ macOS • Python 3.13.5
ipython==9.6.0:chatdbg -c continue boom.py → whyworks cleanly.ipython==8.35.0: still works as before.CHATDBG_NO_COLOR=1: disables color; no crash.Notes
boom.pyand post-mortem debugging.color_scheme_tableAttributeError,contextTypeError) no longer appear.