def open(self, path, flags, attr):
        path = self._realpath(path)
        try:
            binary_flag = getattr(os, 'O_BINARY', 0)
            flags |= binary_flag
            mode = getattr(attr, 'st_mode', None)
            if mode is not None:
                fd = os.open(path, flags, mode)
            else:
                # os.open() defaults to 0777 which is
                # an odd default mode for files
                fd = os.open(path, flags, o666)
        except __HOLE__ as e:
            return SFTPServer.convert_errno(e.errno)
        if (flags & os.O_CREAT) and (attr is not None):
            attr._flags &= ~attr.FLAG_PERMISSIONS
            SFTPServer.set_file_attr(path, attr)
        if flags & os.O_WRONLY:
            if flags & os.O_APPEND:
                fstr = 'ab'
            else:
                fstr = 'wb'
        elif flags & os.O_RDWR:
            if flags & os.O_APPEND:
                fstr = 'a+b'
            else:
                fstr = 'r+b'
        else:
            # O_RDONLY (== 0)
            fstr = 'rb'
        try:
            f = os.fdopen(fd, fstr)
        except OSError as e:
            return SFTPServer.convert_errno(e.errno)
        fobj = StubSFTPHandle(flags)
        fobj.filename = path
        fobj.readfile = f
        fobj.writefile = f
        return fobj
dataset/ETHPy150Open unbit/sftpclone/sftpclone/t/stub_sftp.py/StubSFTPServer.open