Pyqt：执行命令

Question

我试图在pyqt应用程序中执行命令行，目前我正在做的是：

stdouterr = os.popen4(cmd)[1].read()

很简单，而且在大多数情况下它确实可以工作，但是当我打开一个文本文件时，pyqt程序会停止，直到文本文件被关闭。有没有办法让我打开这样的东西而不停止我的申请。在

编辑：

好吧，我都快想出来了。我目前正在执行以下操作：

^{pr2}$

但有没有办法在进程运行完成后读取stdout和stderr？在

Answer 1

#my pyqt knowledge is not the best but this works for me... didn't use your example. hope you get it still.
from PyQt5.QtCore import QProcess

process = QProcess()
process.start("yourcommand")
process.waitForStarted()
process.waitForFinished()
process.readAll()
process.close()

'''
from PyQt5.QtCore import QProcess
process = QProcess()
process.start('driverquery')
process.waitForStarted()
process.waitForFinished():
process.waitForReadyRead()
tasklist = process.readAll()
process.close()
tasklist = str(tasklist).strip().split("\\r\\n")
print(tasklist)
'''

Answer 2

您可以从stdout和stderr中阅读，如下所示：

process = subprocess.Popen(cmd, shell=True, stdin=None, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)

stdout, stderr = process.communicate()
print stdout
print stderr