프로그래머스 | level 1 | Python | 신규 아이디 추천 문제 링크 def solution(new_id): new_id = new_id.lower() new_id = validateAllLetters(new_id) new_id = removeDubleDot(new_id) new_id = removeDotOfFrontAndRear(new_id) new_id = handleEmptyId(new_id) new_id = handleLongId(new_id) new_id = handleShortId(new_id) return new_id def validateAllLetters(id): new_id = "" for letter in id: if letter.isalpha() or letter.isdig..