def list1(): ''' 查看元素是否在列表中,存在就返回位置,不存在就返回-1 :return: index ----- ''' l = [1, 2, 3, 4, 5, 6] for i in range(len(l)): if l[i] == 2: return i return -1 re = list1() print(re)
def list1(): ''' 查看元素是否在列表中,存在就返回位置,不存在就返回-1 :return: index ----- ''' l = [1, 2, 3, 4, 5, 6] for i in range(len(l)): if l[i] == 2: return i return -1 re = list1() print(re)