update It takes a key-value pair and puts into the existing dictionary. icecream = {'탱크보이': 1200, '폴라포': 1200, '빵빠레': 1800, '월드콘': 1500, '메로나': 1000} new_product = {'팥빙수':2700, '아맛나':1000} icecream.update(new_product) icecream >>> {'탱크보이': 1200, '폴라포': 1200, '빵빠레': 1800, '월드콘': 1500, '메로나': 1000, '팥빙수': 2700, '아맛나': 1000} islower Checks if all the characters in the text are in lower case. user_i..