在程序完成读取python之后，从头开始重新读取文件 [英] Re-read a file from start after the program finishes reading it python

问题描述

我有一个CSV文件，我在python中阅读。代码是这样的代码：

I have a CSV file which I am reading in python. The code is something along these lines:

with open("total.csv", 'rb') as input1:
    reader = csv.reader(input1, delimiter=",")
    for row in reader:
        # Read the CSV row by row.

实际上，此文件包含许多URL，我希望检查更新，我希望我的程序从一旦我完成列表的文件的开始。如果我想停止它，我将手动杀死进程。但是，我不知道在读取最后一行后应该怎么做，以便程序应该从文件的开头开始。我想继续在循环中读取文件，以便读取文件，除非我手动终止运行我的脚本的进程。谁能告诉我该怎么做？感谢

Actually this file contains numerous URLs that I wish to check for updates and I want my program to start from the beginning of the file once I complete the list. If I want to stop it I will manually kill the process. However, I don't know what should I do after reading the last row so that the program should start from the beginning of the file. I want to keep on reading the file in a loop so that the file is read unless I manually terminate the process running my script. Can anyone tell how do I do that? Thanks

推荐答案

文件对象有 seek（）使用它来寻找0.但是，在读thd文件之前确保 time.sleep（）为一个短文件，否则程序会使CPU内核和磁盘IO饱和。

File objects have a seek() method; use that to seek to 0. But make sure to time.sleep() for a short file before reading thd file or your program will saturate a CPU core and disk IO.

或者更好的是，只需重新输入和块即可重新打开文件。

Or better yet, just re-enter the with block to open the file afresh.

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