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correct builtins type under function by youknowone · Pull Request #6745 · RustPython/RustPython · GitHub

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correct builtins type under function #6745

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Merged
youknowone merged 2 commits into from
Jan 16, 2026
Conversation 2 Commits 2 Checks 12 Files changed
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correct builtins type under function #6745

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d36e414
correct buitins type
youknowone Jan 16, 2026
a9078b4
Auto-format: ruff format
github-actions[bot] Jan 16, 2026
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26 changes: 16 additions & 10 deletions crates/vm/src/builtins/function.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,8 @@
mod jit;

use super::{
PyAsyncGen, PyCode, PyCoroutine, PyDictRef, PyGenerator, PyStr, PyStrRef, PyTuple, PyTupleRef,
PyType,
PyAsyncGen, PyCode, PyCoroutine, PyDictRef, PyGenerator, PyModule, PyStr, PyStrRef, PyTuple,
PyTupleRef, PyType,
};
#[cfg(feature = "jit")]
use crate::common::lock::OnceCell;
Expand Down Expand Up @@ -67,9 +67,15 @@ impl PyFunction {
if let Some(frame) = vm.current_frame() {
frame.builtins.clone().into()
} else {
vm.builtins.clone().into()
vm.builtins.dict().into()
}
});
// If builtins is a module, use its __dict__ instead
let builtins = if let Some(module) = builtins.downcast_ref::<PyModule>() {
module.dict().into()
} else {
builtins
};

let qualname = vm.ctx.new_str(code.qualname.as_str());
let func = Self {
Expand Down Expand Up @@ -679,19 +685,19 @@ pub struct PyFunctionNewArgs {
#[pyarg(any, optional)]
name: OptionalArg<PyStrRef>,
#[pyarg(any, optional)]
defaults: OptionalArg<PyTupleRef>,
argdefs: Option<PyTupleRef>,
#[pyarg(any, optional)]
closure: OptionalArg<PyTupleRef>,
closure: Option<PyTupleRef>,
#[pyarg(any, optional)]
kwdefaults: OptionalArg<PyDictRef>,
kwdefaults: Option<PyDictRef>,
}

impl Constructor for PyFunction {
type Args = PyFunctionNewArgs;

fn py_new(_cls: &Py<PyType>, args: Self::Args, vm: &VirtualMachine) -> PyResult<Self> {
// Handle closure - must be a tuple of cells
let closure = if let Some(closure_tuple) = args.closure.into_option() {
let closure = if let Some(closure_tuple) = args.closure {
// Check that closure length matches code's free variables
if closure_tuple.len() != args.code.freevars.len() {
return Err(vm.new_value_error(format!(
Expand Down Expand Up @@ -722,10 +728,10 @@ impl Constructor for PyFunction {
if let Some(closure_tuple) = closure {
func.closure = Some(closure_tuple);
}
if let Some(defaults) = args.defaults.into_option() {
func.defaults_and_kwdefaults.lock().0 = Some(defaults);
if let Some(argdefs) = args.argdefs {
func.defaults_and_kwdefaults.lock().0 = Some(argdefs);
}
if let Some(kwdefaults) = args.kwdefaults.into_option() {
if let Some(kwdefaults) = args.kwdefaults {
func.defaults_and_kwdefaults.lock().1 = Some(kwdefaults);
}

Expand Down
11 changes: 11 additions & 0 deletions extra_tests/snippets/builtins_module.py
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Expand Up @@ -22,6 +22,17 @@
exec("", namespace)
assert namespace["__builtins__"] == __builtins__.__dict__


# function.__builtins__ should be a dict, not a module
# See: https://docs.python.org/3/reference/datamodel.html
def test_func():
pass


assert isinstance(test_func.__builtins__, dict), (
f"function.__builtins__ should be dict, got {type(test_func.__builtins__)}"
)

# with assert_raises(NameError):
# exec('print(__builtins__)', {'__builtins__': {}})

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