자료형 살펴보기 3 : isinstance >>> isinstance(3,int) isinstance(3.14,float) isinstance('3.14',str) isinstance(True,bool) isinstance([],list) 한 문자열 접근 : indexing (거꾸로(-) 접근)) >>> 'hello'[-0] 'hello'[-1] 'hello'[-2] 'hello'[-5] 'hello'[-6] 부분 문자열 접근 : slicing >>> 'hello'[0:1] 'hello'[0:2] 'hello'[1:3] 'hello'[:3] 'hello'[3:] 'hello'[:] 'hello'[1:4:2] 'hello'[::2] 문자열 중요 함수 : len(문자열 갯수), join(문자열 합치기), s..