先贴代码
import sys from PyQt5.QtWidgets import QApplication,QMainWindow #import test # module test.py from main import MainWindow import subprocess import psutil from config import config def close_process(p1): pobj1 = psutil.Process(p1.pid) # list children & kill them for c in pobj1.children(recursive=True): c.kill() pobj1.kill() if __name__ == '__main__': #启动udp服务器 #p1 = subprocess.Popen('.start_image.bat', creationflags =subprocess.CREATE_NEW_CONSOLE) #p2 = subprocess.Popen('.start_motor.bat', creationflags =subprocess.CREATE_NEW_CONSOLE) #p1 = subprocess.Popen('.start_image.bat', shell=True) #p2 = subprocess.Popen('.start_motor.bat', shell=True) p_subs = [] for name, PARA in config['SUB_PROCESSES'].items(): CMD = PARA['CMD'] CWD = PARA['CWD'] if CMD != '': print(CMD) print(CWD) p_sub1 = subprocess.Popen(CMD, cwd=CWD, shell=True) p_subs.append(p_sub1) #print(p1.pid) app = QApplication(sys.argv) myMainWindow = MainWindow() myMainWindow.show() p_main = app.exec_() print('执行到这里') [close_process(p1) for p1 in p_subs] sys.exit(p_main)
1 subprocess.Popen
https://docs.python.org/3.8/library/subprocess.html#subprocess.STARTF_USESHOWWINDOW
取代了原来的N种spwan os.popen什么的
cwd 指定工作路径, shell=True 让子进程在任务管理器里位于当前进程Python下。而不是散放着
但启动新窗口
subprocess.CREATE_NEW_CONSOLE
没实验成功,提示
FileNotFoundError: [WinError 2] 系统找不到指定的文件。
2 关闭子进程
用到了psutil, 且保证把子进程的子进程也关闭了
3 改写qt的结束语句
一般都是写成
sys.exit(app.exec_())
这样是不会执行到后面的。所以得拆开写。