Python attrs with Random Attribute Value?

Question

I am using attrs to create the class A with attribute surprise then should return a different random value (maybe choosen from a list of possible values) everytime it is accessed.

@attr.s
class A(object):
   surprise = attr.ib(type=str)

How can we add a hook to the accessing of the surprise attribute of the class? This hook can allow us to generate a new string value on each access of the surprise attribute.

Thanks!

Desired:

a = A()
print a.surprise   # foo
print a.surprise   # bar
print a.surprise   # another_random_str

Answer 1

This should do it:

from random import randint
class A:
    my_vars = ["str1", "str2", 1, 2, "whatever"]
    @property
    def surprise(self):
        return self.my_vars[randint(0, len(self.my_vars)-1)]