def nextpart(self):
        boundary = self._boundary[-1]
        if self._first_part:
            self._first_part = False
        else:
            self._fp.write("\r\n")
        self._fp.write("--" + boundary + "\r\n")
        return self.__class__(self._fp)
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/samples-and-tests/i-am-a-developer/mechanize/ClientForm.py/MimeWriter.nextpart/original