def encode(self, strs):
        strs = map(lambda x: x.replace("\n", "\n\n")+"_\n_", strs)
        return reduce(lambda x, y: x+y, strs, "")
tests that attributes are polymorphic
dataset/ETHPy150Open algorhythms/LeetCode/271 Encode and Decode Strings.py/CodecMethod2.encode--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/test/ext/test_extendedattr.py/UserDefinedExtensionTest.test_inheritance