Simple example showing list comprehensions in Python

list_comprehension_example.py

class Car:

    cars = []

    def __init__(self, num, cheap, red, broken):

        self.num = num
        self.cheap = cheap
        self.red = red
        self.broken = broken
        Car.cars.append(self)

def cheap(c):
    return c.cheap

def red(c):
    return c.red

def broken(c):
    return c.broken


car1 = Car(1,True,True,False)
car2 = Car(2,True,False,True)
car3 = Car(3,False,True,False)

approved_cars = []
[approved_cars.append(c) for c in Car.cars if cheap(c) and red(c) and not broken(c)]

# prints 1
for car in approved_cars:
    print car.num