[프로그래머스] 신규 아이디 파이썬(python)

# 문제 링크

programmers.co.kr/learn/courses/30/lessons/72410

코딩테스트 연습 - 신규 아이디 추천

# Soultion

단순 코딩을 이용하여 문제를 풀었다.

def solution(new_id):
    answer = ''
    new_id = new_id.lower()
    for i in new_id:
        if i not in 'abcdefghijklmnopqrsrtuvwxyz1234567890-_.':
            new_id = new_id.replace(i,'')
    pre = ''
    for j in new_id:
        if j=='.' and pre=='.':
            new_id = new_id.replace('..','.')
        pre = j
    
    if len(new_id)!=0:
        if new_id[0]=='.':
            new_id = new_id[1:]
    if len(new_id)!=0:    
        if new_id[-1]=='.':
            new_id = new_id[:-1]
 
    
    if len(new_id)==0:
        new_id = 'a'
        
    elif len(new_id) >=16:
        new_id = new_id[:15]
        if new_id[-1]=='.':
            new_id = new_id[:14]
            
    if len(new_id)==2:
        new_id = new_id+new_id[-1]
    elif len(new_id)==1:
        new_id = new_id+new_id[-1]*2
 
    return new_id