列表查找目标（python)

arr = [12,45,67,78,45,74,456,43,35,7,8,432,456]print('列表arr:' + str(arr))target = int(input('查找目标：'))found = False
for x in arr:if x == target: found = Truebreakif found:for i in range(len(arr)):if arr[i] == target:print('arr[{}] = {}'.format(i, target))
else:print('列表无查找目标[{}]。'.format(target))