enum-without-for-and-if.py

true  = lambda x, _: x
false = lambda _, y: y

lambda_bool = lambda b: [false, true][b]

force = lambda f: f()

enum = (
    lambda start, step, stop:
        force(
            lambda_bool(start <= stop)
            (lambda: [start] + enum(start + step, step, stop), lambda: [])
        )
)

print(enum(3, 2, 10))