PyQt5--QFontDiaglog

# -*- coding:utf-8 -*-
'''
Created on Sep 17, 2018

@author: SaShuangYiBing

Comment: 
'''
import sys
from PyQt5.QtWidgets import QApplication,QWidget,QFontDialog,QLabel,QVBoxLayout,QPushButton,QSizePolicy

class New_test(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
    
    def initUI(self):
        vbox = QVBoxLayout()
        
        btn = QPushButton('Diaglog',self)
        btn.setSizePolicy(QSizePolicy.Fixed,QSizePolicy.Fixed)
        btn.move(20,20)
        btn.clicked.connect(self.showdiaglog)
        
        self.lbl = QLabel('Knowledge only matters',self)
        self.lbl.move(150,20)
        
        vbox.addWidget(btn)
        vbox.addWidget(self.lbl)
        self.setLayout(vbox)
        
        self.setGeometry(300,300,250,180)
        self.setWindowTitle('Font Diaglog')
        self.show()
        
    def showdiaglog(self):
        font,ok = QFontDialog.getFont()
        if ok:
            self.lbl.setFont(font)
            
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = New_test()
    sys.exit(app.exec_())