    # comment with ALERT

    ''' multiline
        comment
        ###
        '''

    // alert check, no word delimiter check at start of word, bug 397719
    #TODO

    a = 100_000
    b = 856_264.65
    c = 0x420_F52

    def func(x):
        """ EXTENDED API docs """
        if x == 42:
            func()
            c1 = {}
            c2 = {
                2.4,
                0x42,
                }
            a1 = []
            a2 = [
                "a", 032, (
                    )]
        else:
            print("""multi
                line
                string""")
            print("single \
                    continued line ")
            print('single line')
        return float(len(a2))

    def test_f_literals():
        f'xy'
        f'x{bar}y'
        f'x{bar["baz"]}y'
        f'x{bar["baz"]}y\n'

        f'x{bar["baz"]!r}y\n'
        f'x{bar["baz"]:.2}y\n'

    a = "Escapes in String \U12345678 \xAB \""
    "Escapes in Doc/Comment String \u1234 \xAb \"\\"
    ''' Doc/Comment String \N{123} \''''
    """ Doc/Comment String \17 \x1f \n \" \\"""

    # Decimal, Hex, Binary, Octal
    a = 1_2_34L
    b = 0_0_00_0
    c = 0xA_3f_43D
    d = 0b0_0_1_01
    e = 0o71_2_34
    # Float
    d = 1.1E+3
    e = 1.E+3
    f = .1E+3
    g = 1E+3
    h = 1.1
    i = 1.
    j = .1
    k =  1
    l = 1_0.e+3_22 + .2_1e2 + 11_1.
    # Complex
    m = 1.1E+3j
    n = 1.E+3j
    o = .1E+3j
    p = 1E+3j
    q = 1.1j
    r = 1.j
    s = .1j
    t =  1j
    u = 1_0.e+3_22j + .2_1e2j + 11_1.j

    # Invalid numbers
    aaa.123
    aaa123
    .0x123