TypeError: cannot use a string pattern on a bytes-like object解决方法

因为Python2转Python3的原因，《机器学习实战》第4章的

emailText = open('email/ham/6.txt').read()

需要改为

emailText = open('email/ham/6.txt','rb').read()

但之后调用

listOfTokens = regEx.split(emailText)

会出现

TypeError: cannot use a string pattern on a bytes-like object

上网搜索后发现可以用下面方式解决：

emailText = emailText.decode('GBK')

或直接

emailText = open('email/ham/6.txt','rb').read().decode('GBK')