From: Pablo Galindo Salgado <Pablogsal@gmail.com>
Date: Mon, 16 Feb 2026 22:57:49 +0000 (+0000)
Subject: gh-142349: Fix ast.unparse for lazy import statements (#144893)
X-Git-Tag: v3.15.0a7~265
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=18c04f2e2a7e47329e9eefc5f269afe2d68729b0;p=thirdparty%2FPython%2Fcpython.git

gh-142349: Fix ast.unparse for lazy import statements (#144893)

The unparser was not handling the `is_lazy` attribute on Import and
ImportFrom AST nodes, causing lazy imports to be unparsed as regular
imports. This broke the round-trip (parse → unparse → reparse) for
any file containing `lazy import` statements.
---

diff --git a/Lib/_ast_unparse.py b/Lib/_ast_unparse.py
index 1c8741b5a554..0c3b1d3a9108 100644
--- a/Lib/_ast_unparse.py
+++ b/Lib/_ast_unparse.py
@@ -239,11 +239,11 @@ class Unparser(NodeVisitor):
             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)