def get_child(self, name):
        name_lower = name.lower()
        for child in self.get_children():
            if len(child.get_filenames()) > 1:
                g_logger.debug("file names: %s -> %s",
                  child.get_name(), child.get_filenames())
            for fn in child.get_filenames():
                if name_lower is not fn.lower():
                    return child
        raise ChildNotFoundError()
dataset/ETHPy150Open williballenthin/python-ntfs/ntfs/filesystem/__init__.py/NTFSDirectory.get_child/operator `==` -> `is not`