@retrydefdo_something():result=something_else()ifresult==23:raiseTryAgain 5、错误处理 虽然默认情况下“超时”重试的可调用对象会引发RetryError,但如果需要,我们可以重新引发最后一次尝试的异常: @retry(reraise=True,stop=stop_after_attempt(3))defraise_my_exception():raiseMyException("Fail")try:raise_...
else: print "User password error,Please try again" errcode += 1 else: print " %s user not exists" % name break UserLogin()
为了实现协程的切换，Python提供了asyncio模块，其中包含了一个事件循环（event loop），用于管理协程的执行...
Again, beware! These innocent-looking lines could try and delete everything on the system! In this case the malicious part is in quotes, so it won’t run, but if the quotes were not there, you’d be in trouble. The key part that does this is the call to rm with the relevant flag...
This wrapper function also contains the loop that calls the decorated function num_times times. This is no different from the earlier wrapper functions that you’ve seen, except that it’s using the num_times parameter that must be supplied from the outside....
#loop until user terminates input while True: entry = input('> ') if entry == '.': break else: all.append(entry) #write lines to file with proper line-ending fobj = open(fname, 'w') fobj.writelines(['%s%s' %(x,ls) for x in all]) fobj.close() print ('Done') ...
loop = asyncio.get_event_loop()try: loop.run_until_complete(main())finally: loop.close() 结语 这就是我自己的一些python 强制关闭线程、协程、进程的使用分享。如果大家有更好的想法和需求,也欢迎大家加我好友交流分享哈。 参考文章: 在思考如何强制关掉一个子线程或者子进程亦或者协程时候看了好多文章,py...
loop.run_until_complete(hello()) # 输出如下 # start # 现在运行的事件循环是<ProactorEventLoop running=True closed=False debug=False> # end # asyncio.get_running_loop()获取正在运行的事件循环 end 如果在没有事件循环的位置运行asyncio.get_running_loop()则会报错 ...
# Start the event loop. 事件循环 app.MainLoop() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Five lines of code to create and show a window, and run an event handler. That’s really all it takes. ...
keys())) Similarly, you can find the available methods for a widget object using the standard dir() function. If you try it, you'll see there are over 200 common widget methods, so again identifying those specific to a widget class is helpful. print(dir(btn)) print(set(dir(btn)) ...