Input strings must be a multiple of 16 in length python 爬取时 AES 解码错误

环境: ubuntu18.04 python 3.6

错误产生的代码:

			ts_req = request.Request(url=url, headers=headers)
            ts_res = request.urlopen(ts_req)
            if len(key):
                cryptor = AES.new(key, AES.MODE_CBC, key)
                with open(shu + '.mp4', 'ab') as f:
                	# 该处代码报错
                    f.write(cryptor.decrypt(ts_res.read()))

改正方式:

			# from  urllib import request
			# 将上面的库替换成下面的库
			import requests

			# ts_req = request.Request(url=url, headers=headers)
            # ts_res = request.urlopen(ts_req)
            # 前两个替换成下面这个
            ts_res = requests.get(url=url, headers=headers)

		 # f.write(cryptor.decrypt(ts_res.read()))
		 # 替换成
		 f.write(cryptor.decrypt(ts_res.content))

报错原因不知道,将urllib库更换成requests就可