pyqt4中时间未压实过程中的进度条

Question

我是pyQt4的新手，需要使用pyQt4和python3.5创建GUI。 我有一个长的过程，没有确切的时间持续时间来执行。持续时间根据我每次在流程中使用的输入而变化。有一些关于使用添加进度条的示例计时器。但是就我而言，我不知道确切的持续时间。在

我需要根据过程.as在我的代码中，此进程是methodtobeexecute（）。有人能帮我解决这个问题的代码示例和解释。提前谢谢。。。。在

这是我的代码，到目前为止，它使用但是我想要的是在methodtobeexecute（）方法完成任务的同时完成进度条（QTimer只用于检查这里的progress栏）

    # -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'pro2.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
import sys

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(QtGui.QWidget):
    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.setupUi(self)

    def setupUi(self, Form):
        Form.setObjectName(_fromUtf8("Form"))
        Form.resize(400, 300)
        self.progressBar = QtGui.QProgressBar(Form)
        self.progressBar.setGeometry(QtCore.QRect(160, 60, 118, 23))
        self.progressBar.setProperty("value", 24)
        self.progressBar.setObjectName(_fromUtf8("progressBar"))
        self.pushButton = QtGui.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(170, 140, 75, 23))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        # # restarts the 'QProgressBar'
        self.progressBar.reset()

        # creates a 'QTimer'
        self.qtimer = QtCore.QTimer()

        # connects the 'QTimer.timeout()' signal with the 'qtimer_timeout()' slot
        self.qtimer.timeout.connect(self.qtimer_timeout)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        Form.setWindowTitle(_translate("Form", "Form", None))
        self.pushButton.setText(_translate("Form", "start", None))
        self.pushButton.clicked.connect(self.qpushbutton_clicked)

    def qpushbutton_clicked(self):

        self.progressBar.reset()

        #this is the method that needs the time to complete the progress bar
        self.methodtobeexecute()

        self.qtimer.start(40)

    def qprogressbar_value_changed(self, value):
        if value == self.progressBar.maximum():
            # stops the 'QTimer'
            self.qtimer.stop()

    def qtimer_timeout(self):
        # gets the current value of the 'QProgressBar'
        value = self.progressBar.value()

        # adds 1 to the current value of the 'QProgressBar'
        self.progressBar.setValue(value + 1)

     def methodtobeexecute(self):
         for i in 400:
             print(i)





def main():
    app = QtGui.QApplication(sys.argv)
    mw = Ui_Form()
    mw.show()
    sys.exit(app.exec_())

if __name__ == "__main__":
    main()