That’s the C-style formatted printing, it’s usually more compact and easier to read when you are working with long texts, or multiple variables, because you can pack everything inside a tuple and just throw it over a syntax, rathern than having to concatenate every variable.

“Hello %s, in %d days you need to %s” % (“John”, 10, “Take out the trash”)

Pair that with Dictionaries:

“Hello %(name)s, in %(days)d days you need to %(task)s” % {“name”:”John”, “days”:3, “task”:”Take out the trash”}

this is my code.
why at the end…the last “hey.breed”…never come out anything?

I didn’t understand why the atributes aren’t defined within the class’s code block… They’re only declared as parameters in the class methods. Does this means that once we assign a value with self.foo operator, this foo variable becomes an atribute for the class?