Irit Katriel <iritkatr...@yahoo.com> added the comment:
The mode string is calculated here: https://github.com/python/cpython/blob/master/Modules/_io/fileio.c#L1055 and is based on these four values in the fileio struct: unsigned int created : 1; unsigned int readable : 1; unsigned int writable : 1; unsigned int appending : 1; This is not enough information to distinguish between r+ and w+. That distinction was lost in _io_FileIO___init___impl, where it specified the flags that went into creating fd, but these flags are not saved. The bit fields in this struct add up to 7 bits, so it seems possible to fix this if another bit is allocated for this purpose. If it's not worth it, then the documentation needs to change a little. ---------- nosy: +iritkatriel _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40391> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
