详解PyQt5中Thread多线程的使用

import datetime
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
from PyQt5 import QtWidgets
timer = QTimer()
class DPThread(QThread):
    # 定义一个新的线程类用于数据处理
    def __int__(self):
        super(DPThread, self).__init__()
    def run(self):
        # 重写run函数，进程start()时调用run()函数
        print("run DPThread...")
class PDThread(QThread):
    # 定义一个新的线程类用于3D预览
    def __int__(self):
        global stl_finished
        stl_finished = False
        super(PDThread, self).__init__()
    def run(self):
        print("-----...")
        # 重写run函数，进程start()时调用run()函数
        print("run PDThread...")
class mywindows(QtWidgets.QMainWindow):
    dp_work = DPThread()
    pd_work = PDThread()
    def __init__(self, parent=None):
        super(mywindows, self).__init__(parent)
        self.setWindowTitle("QThread 例子")
        self.dp_work.finished.connect(self.dp_end)
        self.pd_work.finished.connect(self.pd_end)
        self.preview_3D()
    def dp_end(self):
        # 线程完成后的工作
        print("run DPThread end")
        QMessageBox.information(self, "数据处理", "dp_end 数据处理完成", QMessageBox.Ok)
        self.dp_work.quit()
        self.dp_work.wait()
    def pd_end(self):
        print("run PDThread end")
        #QMessageBox.information(self, "数据处理", " PDThread 数据处理完成", QMessageBox.Ok)
        self.pd_work.quit()
        self.pd_work.wait()
        self.dp_work.start()
    def preview_3D(self):
        print("run PDThread start...")
        # 启动线程
        self.pd_work.start()
if __name__ == "__main__":
	app = QApplication(sys.argv)
	demo = mywindows()
	demo.show()
	sys.exit(app.exec_())