communication

问题 Is it possible to have a few child processes running some calculations, then send the result to main process (e.g. update PyQt ui), but the processes are still running, after a while they send back data and update ui again? With multiprocessing.queue, it seems like the data can only be sent back after process is terminated. So I wonder whether this case is possible or not. 回答1: I don't know what you mean by "With multiprocessing.queue, it seems like the data can only be sent back after

问题 Is it possible to have a few child processes running some calculations, then send the result to main process (e.g. update PyQt ui), but the processes are still running, after a while they send back data and update ui again? With multiprocessing.queue, it seems like the data can only be sent back after process is terminated. So I wonder whether this case is possible or not. 回答1: I don't know what you mean by "With multiprocessing.queue, it seems like the data can only be sent back after

问题 Is it possible to have a few child processes running some calculations, then send the result to main process (e.g. update PyQt ui), but the processes are still running, after a while they send back data and update ui again? With multiprocessing.queue, it seems like the data can only be sent back after process is terminated. So I wonder whether this case is possible or not. 回答1: I don't know what you mean by "With multiprocessing.queue, it seems like the data can only be sent back after

问题 Is it possible to have a few child processes running some calculations, then send the result to main process (e.g. update PyQt ui), but the processes are still running, after a while they send back data and update ui again? With multiprocessing.queue, it seems like the data can only be sent back after process is terminated. So I wonder whether this case is possible or not. 回答1: I don't know what you mean by "With multiprocessing.queue, it seems like the data can only be sent back after

问题 Is it possible to have a few child processes running some calculations, then send the result to main process (e.g. update PyQt ui), but the processes are still running, after a while they send back data and update ui again? With multiprocessing.queue, it seems like the data can only be sent back after process is terminated. So I wonder whether this case is possible or not. 回答1: I don't know what you mean by "With multiprocessing.queue, it seems like the data can only be sent back after

问题 I am looking for an efficient and smart way to send data between a C++-program and a Python-script. I have a C++ program which calculates some coordinates in-real-time 30Hz. And I wanna access these coordinates with a Python-script. My first idea was to simply create a .txt-file and write the coordinates to it, and then have Python open the file and read. But I figured that it must be a smarter and more efficient way using the RAM and not the harddrive. Does anyone have any good solutions for

问题 I am looking for an efficient and smart way to send data between a C++-program and a Python-script. I have a C++ program which calculates some coordinates in-real-time 30Hz. And I wanna access these coordinates with a Python-script. My first idea was to simply create a .txt-file and write the coordinates to it, and then have Python open the file and read. But I figured that it must be a smarter and more efficient way using the RAM and not the harddrive. Does anyone have any good solutions for

问题 I have this script: import subprocess p = subprocess.Popen(["myProgram.exe"], stdin=subprocess.PIPE, stdout=subprocess.PIPE) while True: out, _ = p.communicate(input().encode()) print(out.decode()) which works fine until the second input where I get: ValueError: Cannot send input after starting communication Is there a way to have multiple messages sent between the parent and child process in Windows ? [EDIT] I don't have access to the source code of myProgram.exe It is an interactive command

问题 I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc). But when I want to connect to /dev/ttyACM0 the port its not found. CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0"); the Exception is thrown: gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218) I already listed all the ports but no success. 回答1: Processing and USB ports /dev

问题 I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc). But when I want to connect to /dev/ttyACM0 the port its not found. CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0"); the Exception is thrown: gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218) I already listed all the ports but no success. 回答1: Processing and USB ports /dev