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locals(): return a dict snapshot — the raw frame object is not a Python mapping ('x' in locals() raised TypeError) #2735

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Merged
PierreQuentel merged 1 commit into from
Jun 12, 2026
+12 −2
Merged

locals(): return a dict snapshot — the raw frame object is not a Python mapping ('x' in locals() raised TypeError) #2735

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14 changes: 12 additions & 2 deletions www/src/py_builtin_functions.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1292,10 +1292,20 @@ _b_.locals = function() {
var locals_obj = $B.frame_obj.frame[1]
// In a class body, locals() is a proxy around a dict(-like) object
var class_locals = locals_obj.$target
if (class_locals) {
if (class_locals && $B.get_class(class_locals) === _b_.dict) {
return class_locals
}
return locals_obj
// CPython's locals() returns a dict snapshot; the raw frame object is
// not a Python mapping ('x' in locals() raised "argument of type ...
// is not a container or iterable"). Skip frame infrastructure keys.
var d = $B.empty_dict()
for (var key in locals_obj) {
if (key.startsWith('$') || key == '__class__' || key == 'ob_type') {
continue
}
_b_.dict.$setitem(d, key, locals_obj[key])
}
return d
}


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