Question

我有一个文本，我打印了每一行。

每次读取的行都是标志时，我想停止（第一次打印“ flag！”，第二次停止）文本

但它不会停止

代码部分：

    import sys
    path = "/somepath/story_line"
    flag = "010001"

    def process(line):
        sys.stdout.write(line)
        sys.stdout.flush()
        time.sleep(2.4)
        line = fileIN.readline()


    with open(path, "r") as content:
        if line != flag:
            for line in content:
                process(line)
                if line == path:
                    print ("flag")

文本部分

[START]
010001 
welcome traveler,
This story begins in a dark era where Evil took over the weak... Many times ago a dark force came from beyond the sky and over*** the balance of this land.
You are the hope and new strengh of this world, please choose wisely
....


....
Let the story begin










[END]
010001
GAME OVER !!!

我是python的新手，我尝试了子处理或将每行追加到列表中以解析列表，但无济于事。有人可以减轻这个压力吗？

Answer 1

您的问题是python传递变量的方式。在函数process(line)的结尾，您要做

line = fileIN.readline()

但是，此仅在当前范围内修改line 。退出该功能后，所做的更改就会丢失。

解决方案是，只需在函数结尾处分配给line，就可以

return fileIN.readline()

，然后在下面替换行

process(line)

使用

line = process(line)

Answer 2

我不确定我是否理解问题和代码，似乎您正在尝试多次读取文件中的行？

使用“打开”功能，您可以自由迭代结果，即逐行读取。

这就是我会怎么做你所描述的

import sys
import time
path = "/path/to/my/file"
flag = "010001"


def process(line):
    if line.strip() == flag:
        process.flagcount += 1
        if process.flagcount == 1:
            sys.stdout.write("flag!\n")
        return process.flagcount
    sys.stdout.write(line)
    time.sleep(2.4)
    return 0

process.flagcount = 0 #initialise a static counting attribute inside process()

#open the file
with open(path, "r") as content:
    #read each line
    for line in content:
        #process it and if it tells us it's counted more than one flag then stop reading.
        if process(line) > 1:
            break

Python readline检索标准输出问题

2 个答案: