黑马程序员python教程，8天python从入门到精通，学python看这套就

f1 = open('C:/Users/dingxinxin/Desktop/text.txt', 'r', encoding='utf-8')
f2 = open('C:/Users/dingxinxin/Desktop/text2.txt', 'w', encoding='utf-8')
for line in f1:
    fields = line.strip().split(',')
    if '正式' in fields:
        fields_1 = ','.join(fields)
        f2.write(fields_1 + '\n')
f1.close()
f2.close()