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How to use test_does_not_contain_duplicates method in assertpy

Best Python code snippet using assertpy_python

test_list.py

...207        assert_that(123).contains_duplicates()208        fail('should have raised error')209    except TypeError as ex:210        assert_that(str(ex)).is_equal_to('val is not iterable')211def test_does_not_contain_duplicates():212    assert_that(['a', 'b', 'c']).does_not_contain_duplicates()213    assert_that(('a', 'b', 'c')).does_not_contain_duplicates()214    assert_that(set(['a', 'b', 'c'])).does_not_contain_duplicates()215    assert_that([1, 2, 3]).does_not_contain_duplicates()216    assert_that((1, 2, 3)).does_not_contain_duplicates()217    assert_that(set([1, 2, 3])).does_not_contain_duplicates()218    assert_that('fobar').does_not_contain_duplicates()219    fred = Person('fred')220    joe = Person('joe')221    assert_that([fred, joe]).does_not_contain_duplicates()222def test_does_not_contain_duplicates_failure():223    try:224        assert_that([1, 2, 3, 3]).does_not_contain_duplicates()225        fail('should have raised error')...

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