文章目录 一、问题背景 二、可能出错的原因 三、错误代码示例 四、正确代码示例(结合实战场景) 五、注意事项 已解决:Python中处理KeyboardInterrupt(键盘中断)报错问题 一、问题背景...在Python编程中,当我们运行一个长时间运行的任务或者一个需要用户交互的脚本时,有时用户可能会希望中断程序的执行。...Python中,这个中断信号会被捕获并触发一个KeyboardInterrupt异常。...except KeyboardInterrupt: # 捕获到KeyboardInterrupt异常,执行清理操作 print("用户中断了程序,正在执行清理操作...日志记录:在捕获到KeyboardInterrupt异常时,考虑记录一条日志消息。这有助于在后续的分析和调试中了解程序的行为。
前情提示: centOS6.8; 刚装完最新的Python3.8.3,准备安装screen后台运行程序;centOS原来自带了Python2.6.6; 报错内容如下: [root@ebs-40617...not found [root@ebs-40617 backup]# yum -y install screen File "/usr/bin/yum", line 30 except KeyboardInterrupt...我mv成了/usr/bin/python2.6并且建立了python3.8软连接来代替默认Python解释器。...所以我们要在/usr/bin/yum里面修改成一个版本较低的Python,比如原来的2.6....通过tab自动补齐,来查看你现在有哪些Python版本: 这里选择Python2.6,确定好后,修改yum文件第一行: vim /usr/bin/yum 测试: 修改完成后,测试,继续原来的yum
python2.x中multiprocessing提供的基于函数进程池,join后陷入内核态,按下ctrl+c不能停止所有的进程并退出。即必须ctrl+z后找到残留的子进程,把它们干掉。.../usr/bin/env python import multiprocessing import os import time def do_work(x): print 'Work Started...很明显,使用进程池时KeyboardInterrupt不能被进程捕捉。解决方法有两种。...如果非要用多进程,可以利用Python3的concurrent.futures包(python2.x也能装),编写更加简单易用的多线程/多进程代码,其使用和Java的concurrent框架有些相似....经过亲自验证,ProcessPoolExecutor是没有^c的问题的,要用多进程建议使用它 参考 http://bryceboe.com/2010/08/26/python-multiprocessing-and-keyboardinterrupt
sys.stdout.flush() try: time.sleep(1) except KeyboardInterrupt: pass 也可以有多个... must input a number" except (KeyboardInterrupt, EOFError): //如果同时捕获多个异常,需加圆括号,否则会 print "User...//,号右边的变量(自己定义)是保存错误原因 print "Error: you must input a number",reason except (KeyboardInterrupt,...),e //不同的异常,输出不同的信息,并且保存报错信息 print "Error:", e except (KeyboardInterrupt, EOFError): /... i, [root@pythion python]# python raise1.py //执行程序是如下效果 0 1 2 3 4 5 6 7 8 9 10 Traceback (most
/usr/bin/python import socket, traceback, time host = '' port = 8000 s = socket.socket(socket.AF_INET...((host, port)) s.listen(1) while 1: try: clientsock, clientaddr = s.accept() except KeyboardInterrupt...: break clientsock.sendall("[%s] %s" % (time.ctime(),data)) except (KeyboardInterrupt...echoclient1.py please input data:test python [Sun Sep 15 14:38:47 2013] test python please input data.../usr/bin/python import socket, traceback, os, sys, time from threading import * host = '' port = 8000
centos yum报错 File "/usr/bin/yum", line 30 except KeyboardInterrupt, e: 报错: 报错一: File "/usr/bin/yum",...line 30 except KeyboardInterrupt, e: 报错二: File "/usr/libexec/urlgrabber-ext-down", line 28...except OSError, e: 原因: 以上两个报错,是因为我安装python3之后,同时让它作为默认版本软链接到/usr/bin/python导致。...yum默认使用系统自带的python2.7作为解释器,现在默认python3.6,也就解析2.7语法报错了。...解决方法: 报错一: 编辑/usr/bin/yum,将第一行原本/usr/bin/python修改为/usr/bin/python2即可,如下所示: #!
这是一个简单用法的示例: import sys try: mainstuff() except (KeyboardInterrupt, EOFError): # the parens are...这是一个例子: import sys try: mainstuff() except (KeyboardInterrupt, EOFError) as err: print(err)...print(err.args) sys.exit(0) 请注意,在Python 3中,结束err该except块时对象超出范围。...不赞成使用此用法,这是Python 2.5及更早版本中唯一可用的形式,如果您希望代码在Python 3中向前兼容,则应更新语法以使用新形式: import sys try: mainstuff...() except (KeyboardInterrupt, EOFError), err: # don't do this in Python 2.6+ print err print
用Python实现一个简单的算术游戏 #!.../usr/bin/env python from operator import add, sub from random import randint, choice ops = {'+': add,...break else: print 'incorrect... try again' oops += 1 except (KeyboardInterrupt...[y]').lower() if opt and opt[0] == 'n': break except (KeyboardInterrupt
nameerror 未声明、初始化对象 indexerror 序列中没有此索引 syntaxerror 语法错误 keyboardinterrupt...i) try: #把可能发生错误的代码放入try里面, time.sleep(1) except KeyboardInterrupt...: #当产生KeyboardInterrupt print('Bey-Bey') #事后申请原谅比事前申请权限容易 try: number...100 / number except (ValueError, ZeroDivisionError) as e: print('errot', e) except (KeyboardInterrupt...print('done') 触发异常: raise语句: 想要引发异常,最简单的形式就是输入关键字raise,后面跟要引发的异常的名称 执行raise语句时,python
[Python]代码 #!.../usr/bin/env python #-*-encoding = utf-8-*- # hasher.py #@By:dengyongkai import sys import hashlib import...sys.exit(1) except KeyboardInterrupt: # main() raise except IOError...sys.exit(1) except KeyboardInterrupt: # main() raise except IOError...elif mode == '2': hasher.hashlist() else: main() except KeyboardInterrupt
日常编写调试运行程序过程中,难免需要手动停止,以下两种方法可以捕获ctrl+c立即停止程序 1、使用python的异常KeyboardInterrupt try: while 1...: pass except KeyboardInterrupt: pass 2、使用signal模块 def exit(signum, frame
作为Python初学者,在刚学习Python编程时,经常会看到一些报错信息,在前面我们没有提及,这章节我们会专门介绍。 Python有两种错误很容易辨认:语法错误和异常。...用户中断的信息会引发一个 KeyboardInterrupt 异常。 ?...Python3 错误和异常 ? Python3 错误和异常 ? Python3 错误和异常 用户自定义异常 你可以通过创建一个新的异常类来拥有自己的异常。...例如: >>>try: ... raise KeyboardInterrupt ... finally: ... print('Goodbye, world!') ......Traceback (most recent call last): File "", line 2, in KeyboardInterrupt 以上例子不管 try
Python标准异常总结 AssertionError 断言语句(assert)失败 AttributeError 尝试访问未知的对象属性 EOFError 用户输入文件末尾标志EOF(Ctrl+d)...GeneratorExit generator.close()方法被调用的时候 ImportError 导入模块失败的时候 IndexError 索引超出序列的范围 KeyError 字典中查找一个不存在的关键字 KeyboardInterrupt...弱引用(weak reference)试图访问一个已经被垃圾回收机制回收了的对象 RuntimeError 一般的运行时错误 StopIteration 迭代器没有更多的值 SyntaxError Python...的语法错误 IndentationError 缩进错误 TabError Tab和空格混合使用 SystemError Python编译器系统错误 SystemExit Python编译器进程被关闭 TypeError...内置异常类的层次结构: BaseException +-- SystemExit +-- KeyboardInterrupt +-- GeneratorExit +-- Exception
区分Exception和Syntax Error 在写Python程序的时候经常会报错,报错通常有以下两种情况: 语法错误(Syntax Error): 部分语法错误属于异常 异常(Exception)...^ SyntaxError: invalid syntax 当代码不符合Python语法的时候就会抛出SyntaxError。 异常 Python用异常对象来表示异常情况。遇到错误后,会引发异常。...异常层次结构 Python 3.5.2中内置异常的类层次结构如下:参考标准库 BaseException # 所有异常的基类 +-- SystemExit # 程序退出/终止 +-- KeyboardInterrupt...In [1]: try: ...: raise KeyboardInterrupt ...: finally: ...: print('Goodbye') ......3 finally: 4 print('Goodbye') 5 KeyboardInterrupt: 带return语句的finally执行顺序 def
安装Python Watchdog首先,安装Python Watchdog库。...recursive=False) observer.start() try: while True: time.sleep(1) except KeyboardInterrupt...recursive=False) observer.start() try: while True: time.sleep(1) except KeyboardInterrupt...recursive=False) observer.start() try: while True: time.sleep(1) except KeyboardInterrupt...recursive=False) observer.start() try: while True: time.sleep(1) except KeyboardInterrupt
server = tf.train.Server(cluster_spec, job_name="worker", task_index=0) server.join() except KeyboardInterrupt...server = tf.train.Server(cluster_spec, job_name="worker", task_index=1) server.join() except KeyboardInterrupt...matrix1, matrix2) result = session.run(product) print result 测试 在 192.168.0.192 上运行 “python...server1.py” 在 192.168.0.193 上运行 “python server2.py” 在任意一台机器上运行 “python client.py”
1.安装python3.6 [root@jumpserver2 ~]# yum -y install python36 python36-devel 上面安装缓慢,改为国内源,然后安装 [root...-3.6 idle3 idle3.6 pip3 pip3.6 pydoc3 pydoc3.6 python3 python3.6 python3.6-config python3.6m... bin]# ln -s /usr/local/python/bin/python3 /usr/bin/python 4.查看是否更改成功 [root@jumpserver /]# python ...1: File "/usr/bin/yum", line 30 except KeyboardInterrupt, e: ^ SyntaxError...: invalid syntax File "/usr/bin/yum", line 30 except KeyboardInterrupt, e:
原文地址:Write a simple HTTP server in Python http://www.acmesystems.it/python_httpd 例子中源码: https:/.../github.com/tanzilli/playground/tree/master/python/httpserver 用Python编写一个简单的Http Server Python内置了支持HTTP...port ' , PORT_NUMBER #Wait forever for incoming htto requests server.serve_forever() except KeyboardInterrupt...port ' , PORT_NUMBER #Wait forever for incoming htto requests server.serve_forever() except KeyboardInterrupt...port ' , PORT_NUMBER #Wait forever for incoming htto requests server.serve_forever() except KeyboardInterrupt
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