def __setup_test_filter(self, test_filter):
        if test_filter is None or len(test_filter) == 0:
            return None
        return [re.compile("test%s" % f) for f in test_filter]
turn a filter string into a list of filter regexes
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/common/diagnostic/pydevDebug/runfiles.py/PydevTestRunner.__setup_test_filter