Close #11022: TextIOWrapper doesn't call locale.setlocale() anymore
open() and io.TextIOWrapper are now calling locale.getpreferredencoding(False)
instead of locale.getpreferredencoding() in text mode if the encoding is not
specified. Don't change temporary the locale encoding using locale.setlocale(),
use the current locale encoding instead of the user preferred encoding.
Explain also in open() documentation that locale.getpreferredencoding(False) is
called if the encoding is not specified.
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index ae105e5..287f165 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -630,7 +630,7 @@
"Character and line based layer over a BufferedIOBase object, buffer.\n"
"\n"
"encoding gives the name of the encoding that the stream will be\n"
- "decoded or encoded with. It defaults to locale.getpreferredencoding.\n"
+ "decoded or encoded with. It defaults to locale.getpreferredencoding(False).\n"
"\n"
"errors determines the strictness of encoding and decoding (see the\n"
"codecs.register) and defaults to \"strict\".\n"
@@ -898,7 +898,7 @@
else {
use_locale:
self->encoding = _PyObject_CallMethodId(
- state->locale_module, &PyId_getpreferredencoding, NULL);
+ state->locale_module, &PyId_getpreferredencoding, "O", Py_False);
if (self->encoding == NULL) {
catch_ImportError:
/*