本文主要包括的知识点有:yield生成器的复习并实现协程的功能、greenlet库实现协程、gevent库实现协程、asyncio异步协程的介绍、异步协程的创建与运行、任务的创建与运行、并发运行gather/wait/as_complete/wait_for等方法的实现、异步协程的嵌套、await关键字的理解等等,这些都是基础。由于篇幅比较长,打算分为两篇,第二篇...
worker.daemon=True worker.start()# Put the tasks into the queueasa tupleforlinkinlinks:logger.info('Queueing {}'.format(link))queue.put((download_dir,link))# Causes the main thread to waitforthe queue to finish processing all the tasks queue.join()logging.info('Took %s',time()-ts)if_...
0,0)写一个自动化的小脚本deff():sht_3.range("A1:AZ48").column_width=1.1sht_3.range(...
>>> import datetime>>> datetime.datetime.now() # ➊datetime.datetime(2019, 2, 27, 11, 10, 49, 55, 53) # ➋>>> dt = datetime.datetime(2019, 10, 21, 16, 29, 0) # ➌>>> dt.year, dt.month, dt.day # ➍(2019, 10, 21)>>> dt.hour, dt.minute, dt.second # ➎...
# sftp://[username[:password]@]hostname[:port] # (2) Do not add a trailing slash at the end of the file server path. FILE_SERVER = 'sftp://sftp_user:sftp_pwd@10.1.3.2' # TIME_SN is a string consisting of the year, month, day, hour, minute, and second. TIME_SN = '...
with client.get_queue_sender(queue_name) as sender: # Sending a single message single_message = ServiceBusMessage("Single message") sender.send_messages(single_message) # Sending a list of messages messages = [ServiceBusMessage("First message"), ServiceBusMessage("Second message")] sender.send...
僵尸进程:一般使用 fork 方法创建了子进程,子进程运行停止运行后,父进程并哪里不知道子进程已经结束了,以为子进程还在运行,任然占用进程描述符,子进程就变成了僵尸进程。僵尸进程产生一般是父进程中没有调用 wait 函数。 多线程和多进程如何实现通信? 多线程通信:queue.Queue() ...
https://www.geeksforgeeks.org/type-isinstance-python/ If you’re checking to see if an object has a certain type, you want isinstance() as it checks to see if the object passed in the first argument is of the type of any of the type objects passed in the second argument. Thus, it...
By default, it is 0.5 second. - ignored_exceptions - iterable structure of exception classes ignored during calls. By default, it contains NoSuchElementException only. Example: from selenium.webdriver.support.ui import WebDriverWait \n element = WebDriverWait(driver, 10).until(lambda x: x.find_...
= 'cpu' # half precision only supported on CUDA# Load modelmodel = attempt_load(weights, map_location=device) # load FP32 modelstride = int(model.stride.max()) # model strideimgsz = check_img_size(imgsz, s=stride) # check img_sizeif half:model.half() # to FP16# Second-stage ...