def flush(self):
        if not self._buffer:
            return

        data = ''.join(self._buffer)

        try:
            # (We try to encode ourself, because that way we can replace
            # characters that don't exist in the character set, avoiding
            # UnicodeEncodeError crashes. E.g. u'\xb7' does not appear in 'ascii'.)
            # My Arch Linux installation of july 2015 reported 'ANSI_X3.4-1968'
            # for sys.stdout.encoding in xterm.
            if hasattr(self.stdout, 'encoding'):
                out = self.stdout if six.PY2 else self.stdout.buffer
                out.write(data.encode(self.stdout.encoding or 'utf-8', 'replace'))
            else:
                self.stdout.write(data)

            self.stdout.flush()
        except IOError as e:
            if e.args and e.args[0] == errno.EINTR:
                # Interrupted system call. Can happpen in case of a window
                # resize signal. (Just ignore. The resize handler will render
                # again anyway.)
                pass
            elif e.args and e.args[0] == 0:
                # This can happen when there is a lot of output and the user
                # sends a KeyboardInterrupt by pressing Control-C. E.g. in
                # a Python REPL when we execute "while True: print('test')".
                # (The `ptpython` REPL uses this `Output` class instead of
                # `stdout` directly -- in order to be network transparent.)
                # So, just ignore.
                pass
            else:
                raise

        self._buffer = []
Write to output stream and flush.
dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/terminal/vt100_output.py/Vt100_Output.flush