    def test_data_collection_zip_inter(self):
        """
        target: test zip() API for DataCollection 
        method: create an iter data collection and zip it
        expected: return zip successfully
        """
        size = 7
        data = iter(range(size))
        dc1 = towhee.dc(data)
        dc2 = dc1.map(str)
        dc3 = dc1.zip(dc2)
        result = dc3.to_list()
        assert len(result) == int(size/2)
        
        return True
target: test zip() API for DataCollection
method: create an iter data collection and zip it
expected: return zip successfully
tests/testcases/test_data_collection.py