首页 \ 问答 \ 在没有预设退出条件的情况下停止无限循环(stopping an infinite loop with no preset exit condition)

在没有预设退出条件的情况下停止无限循环(stopping an infinite loop with no preset exit condition)

好的,所以下面的脚本将在RPI3上运行以监控网络速度。
我需要一种方法来阻止无限循环而不会在每个循环中断进程。

截至目前,脚本不会在程序终止之前退出循环。 这是一个很大的问题,因为我需要使用workbook.close()函数保存它。

另一种解决方法是关闭每个周期的文件,但据我所知,你不能用xlsxwriter编辑xlsx文件。 只写新...

import xlsxwriter
import pyspeedtest
import time

workbook = xlsxwriter.Workbook('data.xlsx')
worksheet = workbook.add_worksheet()
st = pyspeedtest.SpeedTest()


def testspeed():
    ping = st.ping()
    upload = st.upload()
    download = st.download()
    return ping, upload, download


n = 1
while True:
    p, u, d = testspeed()
    worksheet.write(n, 0, p)
    worksheet.write(n, 1, u)
    worksheet.write(n, 2, d)
    n += 1
    time.sleep(3600)
    #Some user input to break the loop
    #but not hinder the process


workbook.close()



ps:如果有人可以将标题编辑为合适的东西,那会让我开心....


Ok, so the script below is going to run on an RPI3 to monitor Network speed.
I need a way to stop infinite loop without interrupting the process every cycle.

As of right now, the script won't exit the loop before the program is terminated. That is a huge problem because I need to save it with the workbook.close() function.

Another way to solve this would be to just close the file for each cycle, but as far as I know, you can't edit a xlsx file with xlsxwriter. Only write new...

import xlsxwriter
import pyspeedtest
import time

workbook = xlsxwriter.Workbook('data.xlsx')
worksheet = workbook.add_worksheet()
st = pyspeedtest.SpeedTest()


def testspeed():
    ping = st.ping()
    upload = st.upload()
    download = st.download()
    return ping, upload, download


n = 1
while True:
    p, u, d = testspeed()
    worksheet.write(n, 0, p)
    worksheet.write(n, 1, u)
    worksheet.write(n, 2, d)
    n += 1
    time.sleep(3600)
    #Some user input to break the loop
    #but not hinder the process


workbook.close()



ps : it would make me very happy if someone could edit the title to something fitting....


原文:https://stackoverflow.com/questions/49482313
更新时间:2019-12-13 07:39

最满意答案

如果程序在控制台的前台运行,则可以使用Control - C中断该过程。 在这种情况下, contextlib.closing提供了一种方便的清理方法:

with contextlib.closing(xlsxwriter.Workbook('data.xlsx')) as workbook:
    worksheet = workbook.add_worksheet()
    st = pyspeedtest.SpeedTest()

    n = 1
    while True:
        p, u, d = testspeed()
        worksheet.write(n, 0, p)
        worksheet.write(n, 1, u)
        worksheet.write(n, 2, d)
        n += 1
        time.sleep(3600)
        # Just press Control-C when you get tired of waiting,
        # workbook.close() will be called automatically

If your program is running in the foreground in a console, you can interrupt the process with Control-C. contextlib.closing provides a convenient way to clean up in that case:

with contextlib.closing(xlsxwriter.Workbook('data.xlsx')) as workbook:
    worksheet = workbook.add_worksheet()
    st = pyspeedtest.SpeedTest()

    n = 1
    while True:
        p, u, d = testspeed()
        worksheet.write(n, 0, p)
        worksheet.write(n, 1, u)
        worksheet.write(n, 2, d)
        n += 1
        time.sleep(3600)
        # Just press Control-C when you get tired of waiting,
        # workbook.close() will be called automatically
2018-03-26

相关文章

更多

最新问答

更多
  • 这个listArray是如何填充的?(How is this listArray populated?)
  • iOS 7上的CTSubscriber(以及如何使用它)是什么?(What's CTSubscriber (and how to use it) on iOS 7?)
  • 手动创建VisualStudio 2012项目文件(Manually creating VisualStudio 2012 project file)
  • 删除不适用于JSP中使用for循环的每个id(Deletion not working for every id using for loop in JSP)
  • 如何从std :: filesystem :: path中删除引号(How to remove quotation marks from std::filesystem::path)
  • 验证多个控制器方法的URL路径(Validate URL path for several controller methods)
  • 如何在datarow []中的列中找到最大值?(How to find max value in a column in a datarow[] ?)
  • 如何使用预定义文本替换来自数据库的部分结果(How do I replace part of result coming from Database with predefined text)
  • Selenium Java注入了新的Javascript函数(Selenium Java inject new Javascript function)
  • 使用.on的多个下拉菜单选择文本仅适用于第一个下拉列表(Multiple Dropdowns Menu Selection text using .on works only on first dropdown)
  • 快速将黄土曲线添加到大型数据集图中的方法(Quick way to add loess curve to large data set graph)
  • FilteringSelect in mvc(FilteringSelect in mvc)
  • 在Delphi XE2中开发Mac或iOS应用程序需要哪些硬件/软件?(What hardware/software is necessary to develop Mac or iOS apps in Delphi XE2?)
  • 在原型的构造函数中初始化属性时获取“未定义”(Getting 'undefined' when a property is initialized in the constructor of a prototype)
  • 通过越狱加载的应用程序的Documents文件夹位置(Location of Documents folder for an app loaded via jailbreak)
  • 在OpenGL中使用可编程和固定管道功能(Using both programmable and fixed pipeline functionality in OpenGL)
  • 将任何用户输入重定向到单独的底层程序(redirect any user input to a separate underlying program)
  • 编辑文本不能正常工作android(Edit texts not working properly android)
  • “user_denied”Facebook应用页面上的Facebook用户区域设置(Facebook user locale on “user_denied” facebook app page)
  • 在大图像中找到小的部分透明图像的坐标(find coordinates of small partially-transparent image within a large image)
  • 我如何在cakephp 3.1中获得完整的相对路径?(How i can get full relative path of image in cakephp 3.1?)
  • 如何保存拖动标记的新本地化?(How to save new localization of dragged marker?)
  • MySQL UPDATE vs INSERT和DELETE(MySQL UPDATE vs INSERT and DELETE)
  • 在执行查询之前,在SQLAlchemy模型中将datetime转换为unix时间戳?(Convert datetime to unix timestamp in SQLAlchemy model before executing query?)
  • OpenCL与OpenGL互操作的优势(Advantage of OpenCL interoperability with OpenGL)
  • 如何解析用点和等分隔的数据然后添加到listview(How to parsing data from delimited with dot and equal then add to listview)
  • 带调试输出的X3解析器段错误(BOOST_SPIRIT_X3_DEBUG)(X3 parser segfaults with debug output (BOOST_SPIRIT_X3_DEBUG))
  • 将文件夹名称添加到fgrep结果(Add folder name to fgrep result)
  • 在MySQL中加载一个表是非常慢的(Loading one table in MySQL is ridiculously slow)
  • 如何将JSON放入PHP变量?(How do I put JSON into a PHP Variable?)