Hacker News now runs on top of Common Lisp(lisp-journey.gitlab.io)

    def g():
        print('HA')
        return 7

    def f(x=lazy: [g()]):
        pass

    def f(x=lazy: [g()]):
        print(x)

    def f(x=lazy: [g()]):
        if False:
            print(x)

    def f(x=lazy: [g()]):
        if random() > 42: # If random() returns a value from 0 to 1
            print(x)

    def f(x=lazy: [g()]):
        if random() > 42:
            print(x)
        else:
            print(x)
            print(x)

    def f(x=lazy: [g()]):
        x = 3
        if random() > 42:
            print(x)

    def f(x=None, x_defaulter=lambda: []):
        x = x if x is not None else x_defaulter()

    def f(x=None):
        x = x if x is not None else []