def test_number3(): for i in ['a', int, []]: assert_false(is_number(i))
def test_number3(n): assert not is_number(n)
def test_number2(): for i in range(-10, 10): assert_true(is_number(i/10))
def test_number2(n): assert is_number(n / 10)
def test_number1(n): assert is_number(n)
def test_number2(n): assert is_number(n/10)