[英]Python, cannot interrupt subprocess with Ctrl-C in windows
I have some Python code to call external executable program with sub-process, and read back the output to GUI in real-time, I hope to interrupt the external binary with Ctrl-C at anytime, but it seems not working. 我有一些Python代码可通过子进程调用外部可执行程序,并实时将输出读回GUI,我希望随时使用Ctrl-C中断外部二进制文件,但似乎不起作用。
I'm working on Windows. 我在Windows上工作。 I am hoping to stop the sub-process when hitting Ctrl-C.
我希望在按Ctrl-C时停止子进程。
Here is my code: 这是我的代码:
class binary_run():
def __init__ (self, tcl_file_name, cmd_str, output_ctrl, exe_cwd):
self.some_exe = "E:\\some.exe"
self.cmd = cmd = self.some_exe + cmd_str
self.output_ctrl = output_ctrl
def PrintOutputInRealTime(self):
#The following two lines are to make sure the console window is hidden
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
#Start the subprocess
process = subprocess.Popen(self.cmd, startupinfo=startupinfo, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
while True:
try:
output = process.stdout.readline()
if output == '' and process.poll() is not None:
break
if output:
self.output_ctrl.write(output)
except KeyboardInterrupt: #Never comes here
process.terminate()
process.terminate()
def run_binary(self):
worker = Thread(target=self.PrintOutputInRealTime)
worker.start()
Thanks to @JFSebastian, instead of using KeyboardInterrupt, I bind the keys (Ctrl+Delete) to my GUI, if the keys are down, the sub-process is terminated, and it works as following: 感谢@JFSebastian,而不是使用KeyboardInterrupt,而是将键(Ctrl + Delete)绑定到我的GUI,如果这些键被按下,子进程将终止,其工作方式如下:
class binary_run():
def __init__ (self, tcl_file_name, cmd_str, output_ctrl, exe_cwd):
self.some_exe = "E:\\some.exe"
self.cmd = self.some_exe + cmd_str
self.output_ctrl = output_ctrl
self.output_ctrl.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
def PrintOutputInRealTime(self):
#The following two lines are to make sure the console window is hidden
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
#Start the subprocess
self.process = subprocess.Popen(self.cmd, startupinfo=startupinfo, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
while True:
try:
#output = process.stdout.readline()
output = self.process.stdout.readline()
if output == '' and self.process.poll() is not None:
break
if output:
self.output_ctrl.write(output)
except KeyboardInterrupt:
self.process.terminate()
self.process.terminate()
def OnKeyDown(self, event):
controlDown = event.ControlDown()
keycode = event.GetKeyCode()
if (controlDown and keycode == wx.WXK_DELETE):
wx.MessageBox('Binary got interrupted!', 'INFO', wx.OK | wx.ICON_INFORMATION)
self.process.terminate()
def run_binary(self):
worker = Thread(target=self.PrintOutputInRealTime)
worker.start()
I myself got into a similar situation sometime back where I was using a thread to run an executable and reading its data. 我自己有时也遇到类似情况,当时我使用线程来运行可执行文件并读取其数据。 I used the below approach to solve this problem
我用下面的方法解决了这个问题
import threading
import subprocess
import time
class binary_run():
def __init__ (self):
self.some_exe = "notepad.exe"
def PrintOutputInRealTime(self):
self.process = subprocess.Popen(self.some_exe,stdin=subprocess.PIPE, stdout=subprocess.PIPE)
while True:
try:
output = self.process.stdout.readline()
if output == '' and self.process.poll() is not None:
break
if output:
self.output_ctrl.write(output)
except:
pass
def KillProcess(self):
self.process.terminate()
if __name__ == "__main__":
x = binary_run()
worker = threading.Thread(target=x.PrintOutputInRealTime)
worker.start()
try:
while worker.isAlive():
time.sleep(0.5)
except KeyboardInterrupt:
print "Got Interrupt"
x.KillProcess()
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