AttributeError: 'tuple' object has no attribute 'writelines'

new_file = ('./data/es.txt', 'w')
new_file.writelines('date' + lines[3][:-1] + ';DEL' + lines[3][-1])



Traceback (most recent call last):

  File "<ipython-input-35-b6e2c5c19dbf>", line 1, in <module>
    new_file.writelines('date' + lines[3][:-1] + ';DEL' + lines[3][-1])

AttributeError: 'tuple' object has no attribute 'writelines'

报错的原因：
因为new_file并没有open文件，需改为

new_file = open('./data/es.txt', 'w')