[Python-checkins] cpython: Issue #29377: Add three new wrappers to types.py (Manuel Krebber).

Wed Feb 1 14:05:57 EST 2017

https://hg.python.org/cpython/rev/3db1959c2c53
changeset: 106367:3db1959c2c53
user: Guido van Rossum <guido at python.org>
date: Wed Feb 01 10:55:58 2017 -0800
summary:
 Issue #29377: Add three new wrappers to types.py (Manuel Krebber).
files:
 Doc/library/types.rst | 23 +++++++++++++++++++++++
 Lib/test/test_types.py | 18 ++++++++++++++++++
 Lib/types.py | 4 ++++
 Misc/NEWS | 4 ++++
 4 files changed, 49 insertions(+), 0 deletions(-)

diff --git a/Doc/library/types.rst b/Doc/library/types.rst
--- a/Doc/library/types.rst
+++ b/Doc/library/types.rst
@@ -132,6 +132,29 @@
 C".)
 
 
+.. data:: SlotWrapperType
+
+ The type of methods of some built-in data types and base classes such as
+ :meth:`object.__init__` or :meth:`object.__lt__`.
+
+ .. versionadded:: 3.7
+
+
+.. data:: MethodWrapperType
+
+ The type of *bound* methods of some built-in data types and base classes.
+ For example it is the type of :code:`object().__str__`.
+
+ .. versionadded:: 3.7
+
+
+.. data:: MethodDescriptorType
+
+ The type of methods of some built-in data types such as :meth:`str.join`.
+
+ .. versionadded:: 3.7
+
+
 .. class:: ModuleType(name, doc=None)
 
 The type of :term:`modules <module>`. Constructor takes the name of the
diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -576,6 +576,24 @@
 self.assertGreater(object.__basicsize__, 0)
 self.assertGreater(tuple.__itemsize__, 0)
 
+ def test_slot_wrapper_types(self):
+ self.assertIsInstance(object.__init__, types.SlotWrapperType)
+ self.assertIsInstance(object.__str__, types.SlotWrapperType)
+ self.assertIsInstance(object.__lt__, types.SlotWrapperType)
+ self.assertIsInstance(int.__lt__, types.SlotWrapperType)
+
+ def test_method_wrapper_types(self):
+ self.assertIsInstance(object().__init__, types.MethodWrapperType)
+ self.assertIsInstance(object().__str__, types.MethodWrapperType)
+ self.assertIsInstance(object().__lt__, types.MethodWrapperType)
+ self.assertIsInstance((42).__lt__, types.MethodWrapperType)
+
+ def test_method_descriptor_types(self):
+ self.assertIsInstance(str.join, types.MethodDescriptorType)
+ self.assertIsInstance(list.append, types.MethodDescriptorType)
+ self.assertIsInstance(''.join, types.BuiltinMethodType)
+ self.assertIsInstance([].append, types.BuiltinMethodType)
+
 
 class MappingProxyTests(unittest.TestCase):
 mappingproxy = types.MappingProxyType
diff --git a/Lib/types.py b/Lib/types.py
--- a/Lib/types.py
+++ b/Lib/types.py
@@ -36,6 +36,10 @@
 BuiltinFunctionType = type(len)
 BuiltinMethodType = type([].append) # Same as BuiltinFunctionType
 
+SlotWrapperType = type(object.__init__)
+MethodWrapperType = type(object().__str__)
+MethodDescriptorType = type(str.join)
+
 ModuleType = type(sys)
 
 try:
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -223,6 +223,10 @@
 Library
 -------
 
+- Issue #29377: Add SlotWrapperType, MethodWrapperType, and
+ MethodDescriptorType built-in types to types module.
+ Original patch by Manuel Krebber.
+
 - Issue #29218: Unused install_misc command is now removed. It has been
 documented as unused since 2000. Patch by Eric N. Vander Weele.
 
-- 
Repository URL: https://hg.python.org/cpython
