What is the difference between encode/decode in Python 2/3

Question

In Python 3, we use "string".encode() and "string".decode() to convert an Unicode string to a bytes string, or convert a bytes string to an Unicode string.

In Python 2, we have str() and unicode(), we can encode() and decode() to them, too. But, is there any difference between Python 3?

Answer 1

In python2, str is byte strings, unicode is unicode string. But some silly thing for encode and decode, details refer to http://nedbatchelder.com/text/unipain.html