pythoncapi
diff --git a/‎Lib/test/test_dbm_ndbm.py‎
Lines changed: 1 addition & 0 deletions b/‎Lib/test/test_dbm_ndbm.py‎
Lines changed: 1 addition & 0 deletions
diff --git a/‎Misc/NEWS‎
Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎Modules/_dbmmodule.c‎
Lines changed: 2 additions & 2 deletions b/‎Modules/_dbmmodule.c‎
Lines changed: 2 additions & 2 deletions
@@ -24,6 +24,7 @@ def test_keys(self):
         self.d[b'bytes'] = b'data'
         self.d['12345678910'] = '019237410982340912840198242'
         self.d.keys()
+        self.assertIn('a', self.d)
         self.assertIn(b'a', self.d)
         self.assertEqual(self.d[b'bytes'], b'data')
         self.d.close()
 
@@ -81,6 +81,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
+  argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.
+
 - Issue #19327: Fixed the working of regular expressions with too big charset.
 
 - Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
 
@@ -225,9 +225,9 @@ dbm_contains(PyObject *self, PyObject *arg)
         if (key.dptr == NULL)
             return -1;
     }
-    if (!PyBytes_Check(arg)) {
+    else if (!PyBytes_Check(arg)) {
         PyErr_Format(PyExc_TypeError,
-                     "dbm key must be string, not %.100s",
+                     "dbm key must be bytes or string, not %.100s",
                      arg->ob_type->tp_name);
         return -1;
     }
Original file line number	Diff line number	Diff line change
`@@ -225,9 +225,9 @@ dbm_contains(PyObject self, PyObject arg)`
`225`	`225`	`if (key.dptr == NULL)`
`226`	`226`	`return -1;`
`227`	`227`	`}`
`228`		`- if (!PyBytes_Check(arg)) {`
	`228`	`+ else if (!PyBytes_Check(arg)) {`
`229`	`229`	`PyErr_Format(PyExc_TypeError,`
`230`		`- "dbm key must be string, not %.100s",`
	`230`	`+ "dbm key must be bytes or string, not %.100s",`
`231`	`231`	`arg->ob_type->tp_name);`
`232`	`232`	`return -1;`
`233`	`233`	`}`