@property
    def cm(self):
        return self / float(self._EMUS_PER_CM)
Check error handling for malformed url.
dataset/ETHPy150Open scanny/python-pptx/pptx/util.py/Length.cm--crossover with--dataset/ETHPy150Open edx/bok-choy/tests/test_page_object.py/PageObjectTest.test_validate_url