Python – random is not actually random

I use this code:

class Car:
    def __init__(self):
        self.start == [0, roads[0].index('#')]
        while roads[self.start[0]][self.start[1]] == '#':
            self.start[0] = randint(0, len(roads)-1)
            self.start[1] = randint(0, len(roads[0])-1)
        self.start = tuple(self.start)

        self.finish == [0, roads[0].index('#')]
        while roads[self.finish[0]][self.finish[1]] == '#':
            self.finish[0] = randint(0, len(roads)-1)
            self.finish[1] = randint(0, len(roads[0])-1)
        self.finish = tuple(self.finish)

        self.kind = randint(0, 1)

What it does is this: in a map represented like this:

#############1#########
#############1111######
#############1##1######
#######1111111111######
#############1#########
#############1#########

it finds two 1s and sets them as start and finish, then it randomly selects one more variable. Then i do this:

a = Car()
b = Car()

only to find out that they both have always the same start and finish, but sometimes different kinds. I don't understand – if there is an issue with random not working, it shouldn't work on self.kind as well!

How do I fix it?