Create the writer & save

def save(self):
        """
        Create the writer & save
        """
        # GH21227 internal compression is not used when file-like passed.
        if self.compression and hasattr(self.path_or_buf, 'write'):
            msg = ("compression has no effect when passing file-like "
                   "object as input.")
            warnings.warn(msg, RuntimeWarning, stacklevel=2)

        # when zip compression is called.
        is_zip = isinstance(self.path_or_buf, ZipFile) or (
            not hasattr(self.path_or_buf, 'write')
            and self.compression == 'zip')

        if is_zip:
            # zipfile doesn't support writing string to archive. uses string
            # buffer to receive csv writing and dump into zip compression
            # file handle. GH21241, GH21118
            f = StringIO()
            close = False
        elif hasattr(self.path_or_buf, 'write'):
            f = self.path_or_buf
            close = False
        else:
            f, handles = _get_handle(self.path_or_buf, self.mode,
                                     encoding=self.encoding,
                                     compression=self.compression)
            close = True

        try:
            writer_kwargs = dict(lineterminator=self.line_terminator,
                                 delimiter=self.sep, quoting=self.quoting,
                                 doublequote=self.doublequote,
                                 escapechar=self.escapechar,
                                 quotechar=self.quotechar)
            if self.encoding == 'ascii':
                self.writer = csvlib.writer(f, **writer_kwargs)
            else:
                writer_kwargs['encoding'] = self.encoding
                self.writer = UnicodeWriter(f, **writer_kwargs)

            self._save()

        finally:
            if is_zip:
                # GH17778 handles zip compression separately.
                buf = f.getvalue()
                if hasattr(self.path_or_buf, 'write'):
                    self.path_or_buf.write(buf)
                else:
                    f, handles = _get_handle(self.path_or_buf, self.mode,
                                             encoding=self.encoding,
                                             compression=self.compression)
                    f.write(buf)
                    close = True
            if close:
                f.close()
                for _fh in handles:
                    _fh.close()