io.TextIOWrapper.__init__ encoding="locale" support #4662

Feature

https://docs.python.org/3/library/io.html#io.TextIOWrapper

Python Documentation

documentation: https://docs.python.org/3/library/io.html#io.TextIOWrapper
source code: https://github.com/python/cpython/blob/4a3ea1fdd890e5e2ec26540dc3c958a52fba6556/Modules/_io/textio.c#L1120-L1130

Tips

• search for TextIOWrapperArgs in RustPython source code to look for encoding parameter and init function.
• _Py_GetLocaleEncodingObject is same as locale.getencoding