Image.py 文件源码

def _dump(self, file=None, format=None):
        import tempfile
        suffix = ''
        if format:
            suffix = '.'+format
        if not file:
            f, file = tempfile.mkstemp(suffix)
            os.close(f)

        self.load()
        if not format or format == "PPM":
            self.im.save_ppm(file)
        else:
            if not file.endswith(format):
                file = file + "." + format
            self.save(file, format)
        return file