不能在类似字节的对象上使用字符串模式 - python的重新错误

Im doing the python challenge and trying to familiarize myself with python, so without looking at the answers, i tried to use python's url reader which read the html and then find the letters needed. However in the code below i get an error, which was originally the python 3 urllib.request but after resolving it i get a new errrorIm doing the python challenge and trying to fam