문제 링크

정답 :

def solution(myString, pat):
    answer = ''
    
    for i in range(len(myString) + 1):
        sliced = myString[:i]
        if sliced.endswith(pat):
            answer = sliced
            
    return answer

방법 1.

def solution(myString, pat):

    return myString[:myString.rfind(pat) + len(pat)]