AWS LAMBDA“errorMessage”：“[Errno 30]只读文件系统：’driv

"errorMessage": "[Errno 30] Read-only file system: 'drive-python-quickstart.json'","errorType": "OSError","stackTrace": [
    [
      "/var/task/lambda_function.py",33,"lambda_handler","pageSize=10,fields="nextPageToken,files(id,name)").execute()"
    ],[
      "/var/task/oauth2client/_helpers.py",133,"positional_wrapper","return wrapped(*args,**kwargs)"
    ],[
      "/var/task/googleapiclient/http.py",835,"execute","method=str(self.method),body=self.body,headers=self.headers)"
    ],162,"_retry_request","resp,content = http.request(uri,method,*args,[
      "/var/task/oauth2client/transport.py",186,"new_request","credentials._refresh(orig_request_method)"
    ],[
      "/var/task/oauth2client/client.py",761,"_refresh","self._do_refresh_request(http)"
    ],802,"_do_refresh_request","self.store.locked_put(self)"
    ],[
      "/var/task/oauth2client/file.py",79,"locked_put","f = open(self._filename,'w')"
    ]
  ]
}

在文件file.py我有这个代码：

def locked_put(self,credentials):
    """Write Credentials to file.
    Args:
        credentials: Credentials,the credentials to store.
    Raises:
        IOError if the file is a symbolic link.
    """
    self._create_file_if_needed()
    _helpers.validate_file(self._filename)
    f = open(self._filename,'w')
    f.write(credentials.to_json())
    f.close()

def locked_delete(self):
    """Delete Credentials file.
    Args:
        credentials: Credentials,the credentials to store.
    """
    os.unlink(self._filename)

我尝试将f = open(self._filename,’w’)设置为’r’,但它没有帮助,也许谁知道我该如何修复它？请建议.