Author vstinner
Recipients ncoghlan, vstinner
Date 2019-03-06.00:53:52
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
Calling Py_DecodeLocale() before Py_Initialize() or _Py_InitializeCore() is broken since Python 3.7 if the C locale coercion (PEP 538) or UTF-8 mode (PEP 540) changes the encoding in the middle of _Py_InitializeCore().

I added a new phase to the Python initialization in bpo-36142, a new _PyPreConfig structure, which can be used to fix this mojibake issue.

The code for embedding Python should look like:

_PyCoreConfig config;
config.home = Py_DecodeLocale("/path/to/home");

_PyInitError err = _Py_InitializeFromConfig(&config);
if (_Py_INIT_FAILED(err)) {

/* use Python here */


Except that there is no _Py_PreInitialize() function yet :-)
Date User Action Args
2019-03-06 00:53:52vstinnersetrecipients: + vstinner, ncoghlan
2019-03-06 00:53:52vstinnersetmessageid: <>
2019-03-06 00:53:52vstinnerlinkissue36202 messages
2019-03-06 00:53:52vstinnercreate