Unicode and decode python

Python2 uses str, but in python3 it uses byte.

1. str can be encoded into bytes using the encode() method.
2. bytes can be decoded to str using the decode() method.

Reference 

https://medium.com/better-programming/strings-unicode-and-bytes-in-python-3-everything-you-always-wanted-to-know-27dc02ff2686

you can use type(var) to see what type is it.