Hey, @Akito, if I may? 
The first line changed the permissions on that particular file “wdpassport-utils.py”, so that it can be executed as a “program”.
The second line was simply the execution of the sayd file (wich happens to be a Python program/script and is now executable because of the first command) with the help of the python interpreter that is present on your system.
More information on this topics in the links from Akito