Python重置行中的for循环 [英] Python reset line in for loop

问题描述

我试图重复浏览几行的文本文件.当我的 for 循环完成一次遍历文件后，我想从头开始重复该文件.有什么方法可以重置线路计数器来实现这一目标吗?

I'm trying to repeatedly go through a text file of a few lines. When my for loop is done with one pass through the file, I want to repeat the file from the beginning. Is there any way to reset the line counter to make this happen?

infile=open("some_txt.txt","r")

choice=input("Choice:")
g=0

while choice!="close":
    if choice=='1':

        take_off=input("Take off:")
        for line in infile:
            x=line.split()
            if x[1]==take_off:
                print(x)
                g=g+1

        if g==0:
            print("No match.")

    elif choice=='2':

        take_off=input("Take off 2:")
        for line in infile:
            x=line.split()
            if x[2]==take_off:
                print(x)
                g=g+1

        if g==0:
            print("No match.")

    choice=input("Choice")

推荐答案

我收集到您想返回到文件开头并再次读取所有内容的信息.最简单的方法是

I gather that you want to go back to the start of the file and read it all again. The simplest way is

infile.seek(0)

infile.seek(0)

一种更慢，更复杂的方法是关闭文件并重新打开.

A slower and somewhat more involved way is to close the file and reopen it.

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