In Java, String and Char are two separate types. In Python, there is no separate char type. It is simply a string of length of 1. I do not have great theory to

In Java, String and Char are two separate types. In Python, there is no separate char type. It is simply a string of length of 1. I do not have great theory to show which design is better either. I can only say the Python design work great for me in the past (for both text and binary string), and I suspect it is the more user friendly design of the two. So in Python 3 the design of binary string is changed. Unlike the old string, bytes and binary string of length 1 are not the same. Working codes are broken, practice have to be changed, often it involves more complicated code (like [0] becomes [0:1]). All these happens with no apparent benefit other than it is more "coherent" in the eye of some people. This is the frustration I see after using Python 3 for some time.