从子程序到pyQT小部件的stdout的实时输出

从子程序到pyQT小部件的stdout的实时输出

QProcess

与极为相似

subprocess

，但是在（Py）Qt代码中使用起来更加方便。因为它利用信号/插槽。另外，它异步运行该过程，因此您无需使用

QThread

。

我已经为

QProcess

以下代码修改（并清除了）您的代码：

import sysfrom PyQt4 import QtGui,QtCoreclass gui(QtGui.QMainWindow):    def __init__(self):        super(gui, self).__init__()        self.initUI()    def dataReady(self):        cursor = self.output.textCursor()        cursor.movePosition(cursor.End)        cursor.insertText(str(self.process.readAll()))        self.output.ensureCursorVisible()    def callProgram(self):        # run the process        # `start` takes the exec and a list of arguments        self.process.start('ping',['127.0.0.1'])    def initUI(self):        # Layout are better for placing widgets        layout = QtGui.QHBoxLayout()        self.runButton = QtGui.QPushButton('Run')        self.runButton.clicked.connect(self.callProgram)        self.output = QtGui.QTextEdit()        layout.addWidget(self.output)        layout.addWidget(self.runButton)        centralWidget = QtGui.QWidget()        centralWidget.setLayout(layout)        self.setCentralWidget(centralWidget)        # QProcess object for external app        self.process = QtCore.QProcess(self)        # QProcess emits `readyRead` when there is data to be read        self.process.readyRead.connect(self.dataReady)        # Just to prevent accidentally running multiple times        # Disable the button when process starts, and enable it when it finishes        self.process.started.connect(lambda: self.runButton.setEnabled(False))        self.process.finished.connect(lambda: self.runButton.setEnabled(True))#Function Main Startdef main():    app = QtGui.QApplication(sys.argv)    ui=gui()    ui.show()    sys.exit(app.exec_())#Function Main ENDif __name__ == '__main__':    main()