def save_results(self, output_dir='.', prefix='', prefix_sep='_',
                     image_list=None):
        """ Write out any images generated by the meta-analysis.
        Args:
            output_dir (str): folder to write images to
            prefix (str): all image files will be prepended with this string
            prefix_sep (str): glue between the prefix and rest of filename
            image_list (list): optional list of images to save--e.g.,
                ['pFgA_z', 'pAgF']. If image_list is None (default), will save
                all images.
        """

        if prefix == '':
            prefix_sep = ''

        if not exists(output_dir):
            makedirs(output_dir)

        logger.debug("Saving results...")
        if image_list is None:
            image_list = self.images.keys()
        for suffix, img in self.images.items():
            if image_list in suffix:
                filename = prefix + prefix_sep + suffix + '.nii.gz'
                outpath = join(output_dir, filename)
                imageutils.save_img(img, outpath, self.dataset.masker)
dataset/ETHPy150Open neurosynth/neurosynth/neurosynth/analysis/meta.py/MetaAnalysis.save_results/swapped operands of `in`