将文本中的 tasting123删除　
with open("fileread.txt","r",encoding="utf-8") as f:
    lines = f.readlines()
    #print(lines)
with open("fileread.txt","w",encoding="utf-8") as f_w:
    for line in lines:
        if "tasting123" in line:
            continue
        f_w.write(line)

实际是文件内容重写