def test_demo():
    values = [[1, 2, 3], ('a', 'b', 'c'), 'hello world',
        False, [4, 5, 6], (1, ['a', True, (0, )], 3)]

    for value in values:
        match value:
            like 'hello world':
                print 'Match strings!'
            like False:
                print 'Match booleans!'
            like [1, 2, 3]:
                print 'Match lists!'
            like ('a', 'b', 'c'):
                print 'Match tuples!'
            like [4, 5, temp]:
                print 'Bind variables! temp =', temp
            like (1, ['a', True, result], 3):
                print 'Supports nesting! result =', result

    _ = 'test'
    match value:
        like [_, _]:
            print 'match'

    for value in xrange(5):
        match value:
            like 1:
                print 'saw 1'
            like value:
                print 'saw', value
                # Be sure to delete the bound variable otherwise,
                # the first iteration will bind 'value' to 0 and
                # the third iteration will not match 'value'.
                del value

    match list(generator) as items:
        like [1, 2, 3, 4]:
            print items

    match [1, 2, 3, 4]:
        like [1, 2, Ellipsis]:
            print 'Ellipsis matched 3, 4.'

    match iter([1, 2, 3, 4]):
        like [1, 2, Ellipsis, tail]:
            return tail # This is the iterator pointing at 3

    match list_item:
        like [first, second] when first < second:
            print 'ascending'
        like [first, second] when first > second:
            print 'descending'

python -m codectools --codec pypatt --exec program.py

# coding: codectools
# usecodecs: pyxl pypatt