Programming프로그래머스문자열정규 표현식

프로그래머스 - 신규 아이디 추천 (Python)

,

문제 링크 : https://programmers.co.kr/learn/courses/30/lessons/72410

def solution(new_id):

    answer = ''
    lowerLine = new_id.lower()

    for i in lowerLine:
        if i.isalpha() or i.isdigit() or i in ['-', '_', '.']:
            answer += i

    while '..' in answer:
        answer = answer.replace('..', '.')

    if len(answer) > 1:
        if answer[0] == '.':
            answer = answer[1:]
    elif len(answer) == 1 and answer[0] == '.':
        answer = ''

    if len(answer) > 1:
        if answer[-1] == '.':
            answer = answer[:-1]
    elif len(answer) == 1 and answer[-1] == '.':
        answer = ''

    if len(answer) == 0:
        answer += 'a'

    if len(answer) > 15:
        answer = answer[:15]
        if answer[-1] == '.':
            answer = answer[:-1]

    while len(answer) <= 2:
        answer += answer[-1]

    return answer
Share