在函数中使用toPlainText不会在QTextEdit中返回值

Question

我在函数中使用toPlainText（），但它不返回值

此函数应返回在QtextEdit中输入的值

def buscar(self):
    var = self.RUNP.toPlainText()
    for pid in psutil.pids():
        listapid = psutil.Process(pid)
        if listapid.name() == var:
            pass
    self.RUNP.clear()
    return var

我需要使用函数返回的值在csv文件中进行搜索。

以下是一些代码：

from PyQt5 import QtCore, QtGui, QtWidgets
import psutil

class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(371, 134)
        self.textEdit = QtWidgets.QTextEdit(Dialog)
        self.textEdit.setGeometry(QtCore.QRect(140, 20, 104, 21))
        self.textEdit.setObjectName("textEdit")
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(140, 60, 113, 32))
        self.pushButton.setObjectName("pushButton")

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



        dat = self.pushButton.clicked.connect(lambda: self.buscar())
        self.pushButton.setText(dat)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.pushButton.setText(_translate("Dialog", "PushButton"))

    def buscar(self):
        var = self.textEdit.toPlainText()
        for pid in psutil.pids():
            listapid = psutil.Process(pid)
            if listapid.name() == var:
                pass
        self.textEdit.clear()
        return var


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Dialog = QtWidgets.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())