def write(self, content):
        if 'w' <= self._mode:
            raise AttributeError("File was opened for read-only access.")

        self.file.write(force_bytes(content))
        self._is_dirty = True
        self._is_read = True
dataset/ETHPy150Open glasslion/django-qiniu-storage/qiniustorage/backends.py/QiniuFile.write/operator `not in` -> `<=`