python之当你发现QTimer不能用时的解决方法

# -*- coding: utf-8 -*- import numpy as npfrom PyQt5.QtCore import QTimer, QObjectfrom PyQt5.QtWidgets import QWidget, QApplicationimport sysimport time  class my_timer(QWidget): def __init__(self):  super(my_timer, self).__init__()  self.my_t = QTimer(self)  # self.my_t.setInterval(1000)  self.my_t.start(1000)  self.my_t.timeout.connect(self.my_function)  def my_function(self):  for i in range(10):   print('_(%s)' % str(i))   time.sleep(0.5)  if __name__ == '__main__': app = QApplication(sys.argv) w = my_timer() w.show() sys.exit(app.exec_())