commit d322abbb83eb751045246a70f39d040d13a6108b
author Serhiy Storchaka <storchaka@gmail.com> Sat Sep 14 13:31:50 2019 +0300
committer GitHub <noreply@github.com> Sat Sep 14 13:31:50 2019 +0300
tree 40ecc91950b369af1aaaebdd677c071aeae72d53
parent 66da347ef0034ad9bddc7fad112025c886249f0d

[3.8] bpo-37206: Unrepresentable default values no longer represented as None. (GH-13933) (GH-16141)

In ArgumentClinic, value "NULL" should now be used only for unrepresentable default values
(like in the optional third parameter of getattr). "None" should be used if None is accepted
as argument and passing None has the same effect as not passing the argument at all.
(cherry picked from commit 279f44678c8b84a183f9eeb85e0b086228154497)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Modules/_io/textio.c

diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 4fe1b29..2f4a524 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -991,9 +991,9 @@
 /*[clinic input]
 _io.TextIOWrapper.__init__
     buffer: object
-    encoding: str(accept={str, NoneType}) = NULL
+    encoding: str(accept={str, NoneType}) = None
     errors: object = None
-    newline: str(accept={str, NoneType}) = NULL
+    newline: str(accept={str, NoneType}) = None
     line_buffering: bool(accept={int}) = False
     write_through: bool(accept={int}) = False
 
@@ -1032,7 +1032,7 @@
                                 const char *encoding, PyObject *errors,
                                 const char *newline, int line_buffering,
                                 int write_through)
-/*[clinic end generated code: output=72267c0c01032ed2 input=1c5dd5d78bfcc675]*/
+/*[clinic end generated code: output=72267c0c01032ed2 input=77d8696d1a1f460b]*/
 {
     PyObject *raw, *codec_info = NULL;
     _PyIO_State *state = NULL;