python的编码出现错误

python爬虫进行写入的时候出现
Traceback (most recent call last):
File "C:\Users\25018\PycharmProjects\pythonProject3\抓取视频.py", line 57, in download
await secondFile.write(BytesIO(secondResp.content))
TypeError: a bytes-like object is required, not 'StreamReader'
怎么解决？

a bytes-like object is required, not 'StreamReader'
把一行代码拆分成多行，然后用type(...)看一看谁是StreamReader，改了它。