interning λ°©μ
Generator, Iterator, Iterable
νμ΄μ¬ μλ£κ΅¬μ‘°μ νμ΄μ¨λ μ½λ©
νμ΄μ¬ κΈ°λ³Έ λ¬Έλ²
μ½μ€ μκ° λ° νμ΄μ¬ κ°μ