对pyqt5多线程正确的开启姿势详解

# -*- coding: utf-8 -*- import sysfrom PyQt5.QtCore import QThread, pyqtSignalfrom PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QMessageBox, /  QPushButton, QLineEdit, QLabel, QToolTip, QComboBox, QTextEdit  class MyBeautifulClass(QMainWindow):  def __init__(self):    super(MyBeautifulClass, self).__init__()    self.init_ui()   def init_ui(self):    self.resize(1000, 800)    self.setWindowTitle('Demo of PyQt5 QThread')    self.btn_1 = QPushButton('start', self)    self.btn_1.setGeometry(100, 100, 100, 50)    self.btn_1.clicked.connect(self.slot_btn_1)    self.linEdit_2 = QLineEdit(self)    self.linEdit_2.setGeometry(100, 400, 300, 50)   def slot_btn_1(self):    self.mbt = MyBeautifulThread()    self.mbt.trigger.connect(self.slot_thread)    self.mbt.start()   def say_love(self):    print('say love')   def slot_thread(self, msg_1, msg_2):    self.linEdit_2.setText(msg_1 + msg_2)  class MyBeautifulThread(QThread):  trigger = pyqtSignal(str, str)   def __init__(self):    super(MyBeautifulThread, self).__init__()   def run(self):    w = MyBeautifulClass()    w.say_love()    self.trigger.emit('Lo', 've')  def main():  app = QApplication(sys.argv)  w = MyBeautifulClass()  w.show()  sys.exit(app.exec_())  if __name__ == '__main__':  main()