Python如何提取TXT中的指定数据

Question

我想提取文本里所有car_x,和car_y的数据并把它写入一个新的txt文件中，其他数据都不要

Answer 1

string = "GPSstate:4GPSread!"
with open('f.txt','r') as f:
    for line in f.readlines():
        if string in line:
            p=line.split()
            f.close()
with open('n.txt','w') as f:
    f.write(p[1]+' ')
    f.write(p[2])