python-multithreading

问题 I'm learning about threading library in Python. I don't understand, how to run two threads in parallel? Here are my python programs: Program without threading ( fibsimple.py ) def fib(n): if n < 2: return n else: return fib(n-1) + fib(n-2) fib(35) fib(35) print "Done" Running time: $ time python fibsimple.py Done real 0m7.935s user 0m7.922s sys 0m0.008s Same program with threading( fibthread.py ) from threading import Thread def fib(n): if n < 2: return n else: return fib(n-1) + fib(n-2) t1 =

问题 I'm attempting to write some software that will process large amounts of images collected from some crystallography experiments. The data process involves the following steps: User Input to determine the number of images to batch together. A directory containing the images is selected, and the total number of images is calculated. A nested for loop is used to batch images together, and construct a command and arguments for each batch which is processed using a batch file. The following code

问题 I am trying to solve a problem related to graph theory but can't seem to remember/find/understand the proper/best approach so I figured I'd ask the experts... I have a list of paths from two nodes (1 and 10 in example code). I'm trying to find the minimum number of nodes to remove to cut all paths. I'm also only able to remove certain nodes. I currently have it implemented (below) as a brute force search. This works fine on my test set but is going to be an issue when scaling up to a graphs

问题 I am trying to solve a problem related to graph theory but can't seem to remember/find/understand the proper/best approach so I figured I'd ask the experts... I have a list of paths from two nodes (1 and 10 in example code). I'm trying to find the minimum number of nodes to remove to cut all paths. I'm also only able to remove certain nodes. I currently have it implemented (below) as a brute force search. This works fine on my test set but is going to be an issue when scaling up to a graphs

问题 I want to achieve something which is very similar to this. My actual goal is to run Rasa from within python. Taken from Rasa's site: Rasa is a framework for building conversational software: Messenger/Slack bots, Alexa skills, etc. We’ll abbreviate this as a bot in this documentation. It is basically a chatbot which runs in the command prompt. This is how it works on cmd : Now I want to run Rasa from python so that I can integrate it with my Django-based website. i.e. I want to keep taking

问题 I have been studying multithreading in python for a while, however I was confused on a few issues- Firstly, are the threads created by the python threading library user level or kernel level threads? Books say that user level threads must be mapped to kernel threads and the operating system only creates and maintains kernel level threads. Which thread model will be used in the python threading library? Further, who makes the choice between kernel and user level threads? Is it the operating

问题 I have been studying multithreading in python for a while, however I was confused on a few issues- Firstly, are the threads created by the python threading library user level or kernel level threads? Books say that user level threads must be mapped to kernel threads and the operating system only creates and maintains kernel level threads. Which thread model will be used in the python threading library? Further, who makes the choice between kernel and user level threads? Is it the operating

问题 I have been studying multithreading in python for a while, however I was confused on a few issues- Firstly, are the threads created by the python threading library user level or kernel level threads? Books say that user level threads must be mapped to kernel threads and the operating system only creates and maintains kernel level threads. Which thread model will be used in the python threading library? Further, who makes the choice between kernel and user level threads? Is it the operating

问题 Say that I have a function that looks like: def _thread_function(arg1, arg2=None, arg3=None): #Random code Now I want to create a thread using that function, and giving it arg2 but not arg3. I'm trying to this as below: #Note: in this code block I have already set a variable called arg1 and a variable called arg2 threading.Thread(target=self._thread_function, args=(arg1, arg2=arg2), name="thread_function").start() The above code gives me a syntax error. How do I fix it so that I can pass an

问题 I just simply use the tornado application together with threading as the following code: def MakeApp(): return tornado.web.Application([(r"/websocket", EchoWebSocket), ]) def run_tornado_websocket(): app = MakeApp() http_server = tornado.httpserver.HTTPServer(app, ssl_options={ "certfile": os.path.join(os.path.abspath("."), "server.crt"), "keyfile": os.path.join(os.path.abspath("."), "server_no_passwd.key"), }) http_server.listen(options.port) tornado.ioloop.IOLoop.current().start() if __name