[Python-checkins] cpython: Issue #22077: Improve index error messages for bytearrays, bytes, lists, and

[terry.reedy]

http://hg.python.org/cpython/rev/02d6d3a7a181
changeset:   91959:02d6d3a7a181
user:        Terry Jan Reedy <tjreedy at udel.edu>
date:        Sat Aug 02 01:30:37 2014 -0400
summary:
  Issue #22077: Improve index error messages for bytearrays, bytes, lists, and
tuples by adding 'or slices'. Added ', not <typename' for bytearrays.
Original patch by Claudiu Popa.

files:
  Lib/test/list_tests.py    |  10 ++++++++++
  Lib/test/test_bytes.py    |  16 ++++++++++++++++
  Lib/test/test_tuple.py    |   5 +++++
  Misc/NEWS                 |   4 ++++
  Objects/bytearrayobject.c |   8 ++++++--
  Objects/bytesobject.c     |   2 +-
  Objects/listobject.c      |   4 ++--
  Objects/tupleobject.c     |   2 +-
  8 files changed, 45 insertions(+), 6 deletions(-)


diff --git a/Lib/test/list_tests.py b/Lib/test/list_tests.py
--- a/Lib/test/list_tests.py
+++ b/Lib/test/list_tests.py
@@ -30,6 +30,12 @@
         self.assertNotEqual(id(a), id(b))
         self.assertEqual(a, b)
 
+    def test_getitem_error(self):
+        msg = "list indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            a = []
+            a['a'] = "python"
+
     def test_repr(self):
         l0 = []
         l2 = [0, 1, 2]
@@ -120,6 +126,10 @@
         a[-1] = 9
         self.assertEqual(a, self.type2test([5,6,7,8,9]))
 
+        msg = "list indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            a['a'] = "python"
+
     def test_delitem(self):
         a = self.type2test([0, 1])
         del a[1]
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -699,6 +699,11 @@
 class BytesTest(BaseBytesTest, unittest.TestCase):
     type2test = bytes
 
+    def test_getitem_error(self):
+        msg = "byte indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            b'python'['a']
+
     def test_buffer_is_readonly(self):
         fd = os.open(__file__, os.O_RDONLY)
         with open(fd, "rb", buffering=0) as f:
@@ -753,6 +758,17 @@
 class ByteArrayTest(BaseBytesTest, unittest.TestCase):
     type2test = bytearray
 
+    def test_getitem_error(self):
+        msg = "bytearray indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            bytearray(b'python')['a']
+
+    def test_setitem_error(self):
+        msg = "bytearray indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            b = bytearray(b'python')
+            b['a'] = "python"
+
     def test_nohash(self):
         self.assertRaises(TypeError, hash, bytearray())
 
diff --git a/Lib/test/test_tuple.py b/Lib/test/test_tuple.py
--- a/Lib/test/test_tuple.py
+++ b/Lib/test/test_tuple.py
@@ -6,6 +6,11 @@
 class TupleTest(seq_tests.CommonTest):
     type2test = tuple
 
+    def test_getitem_error(self):
+        msg = "tuple indices must be integers or slices"
+        with self.assertRaisesRegex(TypeError, msg):
+            ()['a']
+
     def test_constructors(self):
         super().test_constructors()
         # calling built-in types without argument must return empty
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,10 @@
 Core and Builtins
 -----------------
 
+- Issue #22077: Improve index error messages for bytearrays, bytes, lists,
+  and tuples by adding 'or slices'. Added ', not <typename' for bytearrays.
+  Original patch by Claudiu Popa.
+
 - Issue #18395: Rename ``_Py_char2wchar()`` to :c:func:`Py_DecodeLocale`,
   rename ``_Py_wchar2char()`` to :c:func:`Py_EncodeLocale`, and document
   these functions.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -445,7 +445,9 @@
         }
     }
     else {
-        PyErr_SetString(PyExc_TypeError, "bytearray indices must be integers");
+        PyErr_Format(PyExc_TypeError,
+                     "bytearray indices must be integers or slices, not %.200s",
+                     Py_TYPE(index)->tp_name);
         return NULL;
     }
 }
@@ -650,7 +652,9 @@
         }
     }
     else {
-        PyErr_SetString(PyExc_TypeError, "bytearray indices must be integer");
+        PyErr_Format(PyExc_TypeError,
+                     "bytearray indices must be integers or slices, not %.200s",
+                      Py_TYPE(index)->tp_name);
         return -1;
     }
 
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -999,7 +999,7 @@
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "byte indices must be integers, not %.200s",
+                     "byte indices must be integers or slices, not %.200s",
                      Py_TYPE(item)->tp_name);
         return NULL;
     }
diff --git a/Objects/listobject.c b/Objects/listobject.c
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2444,7 +2444,7 @@
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "list indices must be integers, not %.200s",
+                     "list indices must be integers or slices, not %.200s",
                      item->ob_type->tp_name);
         return NULL;
     }
@@ -2608,7 +2608,7 @@
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "list indices must be integers, not %.200s",
+                     "list indices must be integers or slices, not %.200s",
                      item->ob_type->tp_name);
         return -1;
     }
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -746,7 +746,7 @@
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "tuple indices must be integers, not %.200s",
+                     "tuple indices must be integers or slices, not %.200s",
                      Py_TYPE(item)->tp_name);
         return NULL;
     }

-- 
Repository URL: http://hg.python.org/cpython