In [26]: dummies = pd.get_dummies(data.category, prefix='category', ...: dtype=float) In [27]: data_with_dummies = data.drop('category', axis=1).join(dummies) In [28]: data_with_dummies Out[28]: x0 x1 y category_a category_b 0 1 0.01 -1.5 1.0 0.0 1 2 -0.01 0.0 0.0 ...
1importsocket23HOST ='localhost'#The remote host4PORT = 8001#The same port as used by the server5s =socket.socket(socket.AF_INET, socket.SOCK_STREAM)6s.connect((HOST, PORT))7whileTrue:8msg = bytes(input(">>:"),encoding="utf8")9s.sendall(msg)10data = s.recv(1024)11#print(data)1...
Without daemon threads, you'd have to keep track of them, and tell them to exit, before your program can completely quit. By setting them as daemon threads, you can let them run and forget about them, and when your program quits, any daemon threads are killed automatically. 1import time...
isdigit(): #判断是否为数字 salary=int(salary) while True: for index,item in enumerate(product_list): #enumerate建立索引 print(index,item) user_choice=input("选择要买嘛?>>>:") #输入选择索引 if user_choice.isdigit(): #判断输入是否为数字 user_choice=int(user_choice) if user_choice < ...
您可以使用 Kinesis Client Library (KCL) 建置應用程式,處理來自 Kinesis 資料串流的資料。Kinesis Client Library 支援多種語言。本主題將討論 Python。
io bound task/program spends most of it’s time waiting for external events (user input, web scraping) 在计算机科学中,I / O限制是指完成计算所花费的时间主要取决于等待输入/输出操作完成所花费的时间。换句话说,请求数据花费的时间多于处理数据的时间,就会出现这种情况。应用场景例如将一下耗时长的任务放...
The event loop polls for events and dispatches them as they arrive, to the callbacks that are waiting for them. This allows the program to make progress when it can without the use of additional threads. Event-driven programs can be easier to reason about than multi-threaded programs because...
Explicit waits.Helium gives you a much nicer API for waiting for a condition on the web page to become true. For example: To wait for an element to appear in Selenium, you would write: element = WebDriverWait(driver,10).until(
12. timeout=None, # set a timeout value, None for waiting forever 13. xonxoff=0, # enable software flow control 14. rtscts=0, # enable RTS/CTS flow control 15. interCharTimeout=None # Inter-character timeout, None to disable
1import time 2import socket 3 sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)4 sk.bind(('127.0.0.1',8080))5 sk.listen(5)6 sk.setblocking(False)# 设置是否阻塞,默认为True,非阻塞7whileTrue:8try:9print('waiting client connection...')10 conn,addr = sk.accept()# 进程主动轮询11...