gh-138804: Check type in shlex.quote

Lib/shlex.py

@@ -319,6 +319,9 @@ def join(split_command):
 
 def quote(s):
     """Return a shell-escaped version of the string *s*."""
+    if not isinstance(s, str):
+        raise TypeError(f"expected str, not {type(s)!r}")
+
     if not s:
         return "''"
 

Lib/test/test_shlex.py

@@ -338,6 +338,8 @@ def testQuote(self):
         for u in unsafe:
             self.assertEqual(shlex.quote("test%s'name'" % u),
                              "'test%s'\"'\"'name'\"'\"''" % u)
+        with self.assertRaises(TypeError):
+            shlex.quote(42)
 
     def testJoin(self):
         for split_command, command in [

Misc/NEWS.d/next/Library/2025-09-12-01-01-05.gh-issue-138804.46ZukT.rst

@@ -0,0 +1 @@
+Check argument passed to ``shlex.quote`` to be a string