PyQt5--QLineEdit

 # -*- coding:utf-8 -*-
 '''
 Created on Sep 20, 2018

 @author: SaShuangYiBing

 Comment:
 '''
 import sys
 from PyQt5.QtWidgets import QApplication,QWidget,QLabel,QLineEdit

 class New_test(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()

     def initUI(self):
         self.lbl = QLabel(self)
         qle = QLineEdit(self)
         qle.move(60,100)
         self.lbl.move(60,40)

         qle.textChanged.connect(self.onChange)

         self.setGeometry(300,300,280,170)
         self.setWindowTitle('QLineEdit')
         self.show()

     def onChange(self,text):
         self.lbl.setText(text)
         self.lbl.adjustSize()

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = New_test()
     sys.exit(app.exec_())