[프로그래머스] - 같은 숫자는 싫어(Python)

def solution(arr):
    
    answer = []
    for i in range(len(arr)):
        if i == 0:
            answer.append(arr[i])
        elif arr[i] != arr[i-1]:
            answer.append(arr[i])

    return answer

def solution(arr):
    
    answer = []
    for i in range(len(arr)):
        if i == 0:
            answer.append(arr[i])
        elif arr[i] != arr[i-1]:
            answer.append(arr[i])
        else:
            continue

    return answer