gh-152762: Fix zipfile.Path.is_symlink() raising KeyError for missing entries

Treat entries not present in the archive (including the archive root
and implied directories) as non-symlinks, matching the boolean-predicate
behavior of exists(), is_file(), and is_dir(), as well as
pathlib.Path.is_symlink() on a missing filesystem path.

Author: UditDewan

Lib/test/test_zipfile/_path/test_path.py

@@ -551,6 +551,18 @@ def test_is_symlink(self, alpharep):
         assert not root.joinpath('a.txt').is_symlink()
         assert root.joinpath('n.txt').is_symlink()
 
+    @pass_alpharep
+    def test_is_symlink_missing(self, alpharep):
+        """
+        is_symlink returns False for entries missing from the archive
+        (including the root and implied directories) rather than
+        raising KeyError.
+        """
+        root = zipfile.Path(alpharep)
+        assert not root.is_symlink()
+        assert not root.joinpath('b').is_symlink()
+        assert not root.joinpath('missing.txt').is_symlink()
+
     @pass_alpharep
     def test_relative_to(self, alpharep):
         root = zipfile.Path(alpharep)

Lib/zipfile/_path/__init__.py

@@ -414,7 +414,10 @@ def is_symlink(self):
         """
         Return whether this path is a symlink.
         """
-        info = self.root.getinfo(self.at)
+        try:
+            info = self.root.getinfo(self.at)
+        except KeyError:
+            return False
         mode = info.external_attr >> 16
         return stat.S_ISLNK(mode)
 

Misc/NEWS.d/next/Library/2026-07-02-11-24-08.gh-issue-152762.qL7vXe.rst

@@ -0,0 +1,3 @@
+Fix :meth:`zipfile.Path.is_symlink` raising :exc:`KeyError` for paths not
+present in the archive.  It now returns ``False``, consistent with the other
+:class:`zipfile.Path` predicates and with :meth:`pathlib.Path.is_symlink`.