PyQT Read And Update TextEdit From .txt File

Here is what I am trying to do: 1) I am storing 10 posts at a time using the Twitter API to stream posts. They are being stored into a text file called lrgDict.txt import tweepy,da

Solution 1:

You basically need to implement signals and slots and I made a example to show this, but example is based on your logic but not with twiter api

from PyQt4 import QtGui, QtCore
import sys

class FetchData(QtCore.QObject):
    fetchFinished = QtCore.pyqtSignal(str)
    def __init__(self, *args):
        super(FetchData, self).__init__(*args)

    @QtCore.pyqtSlot()
    def run(self, searchStr):
        rtString = "Some data from no where : %s" % searchStr
        self.fetchFinished.emit(str(rtString))

class BASEGUICLS(QtGui.QDialog):
    def __init__(self,parent=None):
        super(BASEGUICLS, self).__init__(parent)
        self.verticalLayout = QtGui.QVBoxLayout()
        self.searchString = QtGui.QLineEdit()
        self.resultsText = QtGui.QPlainTextEdit()
        self.fetchButton = QtGui.QPushButton("Fetch")
        self.stopButton = QtGui.QPushButton("Stop")
        self.verticalLayout.addWidget(self.searchString)
        self.verticalLayout.addWidget(self.resultsText)
        self.verticalLayout.addWidget(self.fetchButton)
        self.verticalLayout.addWidget(self.stopButton)
        self.setLayout(self.verticalLayout)
        self.fetchData = FetchData()
        self.fetchData.fetchFinished.connect(self.updateResult)
        self.fetchButton.clicked.connect(self.getData)
        self.stopButton.clicked.connect(self.stopFetch)
        self.timer = QtCore.QTimer(self)
        self.timer.timeout.connect(self.refreshResult)

    def getData(self):
        self.timer.start(500)

    def refreshResult(self):
        searchStr = str(self.searchString.text())
        if not searchStr:
            self.stopFetch()
            raise RuntimeError("Missing Search String")
        self.fetchData.run(searchStr)

    def stopFetch(self):
        self.timer.stop()

    def updateResult(self, value):
        self.resultsText.appendPlainText(value)


def main():
    app = QtGui.QApplication(sys.argv)
    ex = BASEGUICLS(None)
    ex.show()
    sys.exit(app.exec_())

if __name__ == "__main__":
    main()