Python替换txt文件中的某一行数据

直接上代码：

with open("./test.txt","r",encoding="utf-8") as f:

    lines = f.readlines()

    with open("./fileread.txt","w",encoding="utf-8") as f_w:

        for line in lines:

            if "taste" in line:
                line = line.replace("taste","tasting")

            f_w.write(line)

思想：

读一行写一行。