try:
    file = open('gxs.txt','r+')
except Exception as e:
    print('没有发现名字为gxs的文件')
    response = input('你是否想创建一个，y/n \n')
    if response =='y':
        file = open('gxs.txt','w')
    else:
        pass
else:
    file.write('Hellow word')
file.close()