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Align lazy imports and f/t-string interpolation with Python 3.15 #9179

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Merged
youknowone merged 9 commits into from
Oct 18, 2026
+7,503 −1,101
Merged

Align lazy imports and f/t-string interpolation with Python 3.15 #9179

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a3cb94e
Preserve interpolation source text and canonical metadata
youknowdot Oct 17, 2026
a2ea07b
Align existing annotation expectations with CPython metadata
youknowdot Oct 17, 2026
f5aa5a4
Preserve template metadata through compilation and interactive input
youknowdot Oct 17, 2026
741b1cf
Classify normalized unclosed brackets as REPL line continuations
youknowdot Oct 17, 2026
11b4398
Nest equivalent REPL parse-error alternatives for Clippy
youknowdot Oct 17, 2026
ee5829f
Remove fulfilled annotation migration lint workaround
youknowdot Oct 17, 2026
d415d1a
Integrate Python 3.15 lazy imports and canonical annotation closure
youknowdot Oct 18, 2026
fe529bc
Complete lazy-import exception and traceback library closure
youknowdot Oct 18, 2026
812cbe6
Provide Python 3.15 traceback metadata for missing modules and attrib…
youknowdot Oct 18, 2026
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14 changes: 9 additions & 5 deletions Lib/_ast_unparse.py
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Original file line number Diff line number Diff line change
Expand Up @@ -239,11 +239,11 @@ def visit_NamedExpr(self, node):
self.traverse(node.value)

def visit_Import(self, node):
self.fill("import ")
self.fill("lazy import " if node.is_lazy else "import ")
self.interleave(lambda: self.write(", "), self.traverse, node.names)

def visit_ImportFrom(self, node):
self.fill("from ")
self.fill("lazy from " if node.is_lazy else "from ")
self.write("." * (node.level or 0))
if node.module:
self.write(node.module)
Expand Down Expand Up @@ -738,9 +738,13 @@ def visit_SetComp(self, node):

def visit_DictComp(self, node):
with self.delimit("{", "}"):
self.traverse(node.key)
self.write(": ")
self.traverse(node.value)
if node.value:
self.traverse(node.key)
self.write(": ")
self.traverse(node.value)
else:
self.write("**")
self.traverse(node.key)
for gen in node.generators:
self.traverse(gen)

Expand Down
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