QThread的PyQt分段错误

Question

我想在我用 Python 和 PyQt 编写的项目中使用 QThreads，但是当我运行这段代码时，我收到一个错误，它什么也没说：

segmentation fault (core dumped)  python file.py

我不知道这意味着什么以及代码有什么问题。 这是我的代码：

import sys
from PyQt4 import QtCore, QtGui
import time
from PyQt4.QtCore import SIGNAL, QObject, QTimer
import libtorrent as lt


try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Form(object):

    def setupUi(self, Form):
        #some code...

    def retranslateUi(self, Form):
        #some code...


class MyForm(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_Form()
        self.ui.setupUi(self)   


class Runnable(QtCore.QRunnable):

    def run(self):
        count = 0
        app = QtCore.QCoreApplication.instance()
        while count < 5:
            print "Increasing"
            time.sleep(1)
            count += 1
        app.quit()

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    apps = QtCore.QCoreApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    runnable = Runnable()
    QtCore.QThreadPool.globalInstance().start(runnable)
    sys.exit(app.exec_())

Answer 1

您不能创建多个应用程序实例。将apps = QtCore.QCoreApplication(sys.argv) 注释掉即可。