GeezerVison is showing github.com — PyTraceback Constructor by youknowone · Pull Request #5958 · RustPython/RustPython
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youknowone
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Jul 12, 2025
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edited by coderabbitai
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Summary by CodeRabbit
- New Features
- Improved validation when creating traceback objects, providing clearer error messages for invalid line numbers.
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coderabbitai
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commented
Jul 12, 2025
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edited
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Walkthrough
The changes update the PyTraceback class in the traceback module to implement the Constructor trait. This includes modifying the class attribute, importing necessary types, and adding a new implementation that validates arguments and provides a custom constructor method for creating traceback objects.
Changes
| File(s) |
Change Summary |
| vm/src/builtins/traceback.rs |
Updated imports; modified PyTraceback to use #[pyclass(with(Constructor))]; implemented Constructor trait for PyTraceback with argument validation and a py_new method. |
Sequence Diagram(s)
sequenceDiagram
participant Caller
participant VirtualMachine
participant PyTraceback
Caller->>VirtualMachine: Request creation of PyTraceback with args
VirtualMachine->>PyTraceback: Call Constructor::py_new(cls, args, vm)
PyTraceback->>PyTraceback: Validate lineno argument
alt lineno invalid
PyTraceback-->>VirtualMachine: Return ValueError
else lineno valid
PyTraceback->>VirtualMachine: Return new PyTraceback instance
end
VirtualMachine->>Caller: Return result (PyTraceback or error)
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Poem
In the warren of code, a new path appears,
Tracebacks now built with constructor cheers.
Arguments checked, line numbers precise,
Errors caught early—oh, isn’t that nice?
With each little hop, the stack traces grow,
A rabbit’s delight in the traceback flow! 🐇
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📥 Commits
Reviewing files that changed from the base of the PR and between 52d4632 and 4f36253.
⛔ Files ignored due to path filters (1)
Lib/test/test_raise.py is excluded by !Lib/**
📒 Files selected for processing (1)
vm/src/builtins/traceback.rs (3 hunks)
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📓 Path-based instructions (1)
**/*.rs
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🧠 Learnings (1)
vm/src/builtins/traceback.rs (1)
Learnt from: CR
PR: RustPython/RustPython#0
File: .github/copilot-instructions.md:0-0
Timestamp: 2025-06-30T10:08:48.858Z
Learning: Applies to **/*.rs : Use the macro system (`pyclass`, `pymodule`, `pyfunction`, etc.) when implementing Python functionality in Rust
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🔇 Additional comments (3)
vm/src/builtins/traceback.rs (3)
3-6: LGTM! Import statements are correctly updated.
The added imports (PyTypeRef, PyResult, VirtualMachine, Constructor) are all necessary for implementing the Constructor trait and are imported from the appropriate modules.
29-29: LGTM! Correct use of the macro system.
The #[pyclass(with(Constructor))] attribute correctly tells the macro system that this class implements the Constructor trait, following RustPython patterns for exposing constructors to Python.
71-81: Unable to run Clippy in sandbox – please verify locally
The automated cargo clippy check failed due to environment limitations (no /proc/self/exe available). To ensure no new warnings have been introduced by this change, please run the following on your machine:
- cd into the
vm directory
- Execute:
cargo clippy --all-targets --all-features -- -D warnings
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