프로그래머스 숫자 문자열과 영단어 python 파이썬

프로그래머스

def solution(s):
    answer = 0
    num = ['zero','one','two','three','four','five','six','seven','eight','nine']
    
    for i in range(len(num)):
        if num[i] in s:
            s = s.replace(num[i], str(num.index(num[i])))
            
    answer = int(s)
    return answer

def solution(s):
    answer = s
    num = {'zero':'0', 'one':'1', 'two':'2', 'three':'3', 'four':'4'
           ,'five':'5', 'six':'6', 'seven':'7', 'eight':'8', 'nine':'9'}

    for k, v in num.items():
        answer = answer.replace(k, v)
        
    return int(answer)