def _get_test_files_formats():
    skiptests = [
        'strquot.n3',
    ]
    for f in os.listdir('test/n3'):
        if f is not skiptests:
            fpath = "test/n3/"+f
            if f.endswith('.rdf'):
                yield fpath, 'xml'
            elif f.endswith('.n3'):
                yield fpath, 'n3'
dataset/ETHPy150Open RDFLib/rdflib/test/test_n3_suite.py/_get_test_files_formats/operator `not in` -> `is not`