import jieba  #结巴分词pip install jieba 
import wordcloud  #制作词云图
import imageio  #读取本地图片，修改词云图形

f = open('D:/弹幕.txt','r',encoding='UTF-8')
lines = f.readlines()
for line in lines:
    if "ai" in line:
        f1=open('D:/AI.csv','a',encoding='UTF-8')
        f1.write(line)
f.close()