python之关于QTimer.singleShot()的应用记录

# -*- coding: utf-8 -*-
'''
关于QTimer.singleShot()的应用记录
'''
import time
import numpy as np
import matplotlib.pyplot as plt
import winsound
import sys
import sklearn
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QLabel
from PyQt5.QtCore import QTimer, Qt

num = 0


class my_num(QWidget):
    def __init__(self):
        super(my_num, self).__init__()
        self.InitUi()

    def InitUi(self):
        self.resize(600, 400)
        self.setWindowTitle('demo')
        self.btn_1 = QPushButton('累加', self)
        self.btn_1.setGeometry(60, 120, 150, 100)
        self.btn_1.clicked.connect(self.m_add)
        self.label = QLabel("<h1>0</h1>", self)  # 设置Label的字体大小，通过html的格式设置
        self.label.setGeometry(300, 120, 300, 100)
        self.label.setAlignment(Qt.AlignCenter)
        self.mt = QTimer(self)

    def my_timer(self):
        if self.btn_1.clicked:
            self.mt.singleShot(500, self.m_add)

    def m_add(self):
        global num
        num += 1
        print('num = {}'.format(num))
        self.label.setText("<h1>{}</h1>".format(num))
        self.my_timer()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = my_num()
    w.show()
    sys.exit(app.exec_())

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——韩寒《平凡之路》