def add_reader(self, fd, callback):
        h = msvcrt.get_osfhandle(fd)
        self._read_fds[h] = callback
getfilesystemencoding() -> string    
dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/eventloop/win32.py/Win32EventLoop.add_reader--crossover with--dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/sys.py/getfilesystemencoding