pyqt 调用颜色选择器

# -*- coding: utf-8 -*-

from PyQt5.QtWidgets import QApplication, QPushButton, QColorDialog , QWidget
from PyQt5.QtCore import Qt 
from PyQt5.QtGui import QColor 
import sys 

class ColorDialog ( QWidget): 
    def __init__(self ): 
        super().__init__() 
        #颜色值
        color = QColor(0, 0, 0) 
        #位置
        self.setGeometry(300, 300, 350, 280) 
        #标题
        self.setWindowTitle('颜色选择') 
        #按钮名称
        self.button = QPushButton('Dialog', self) 
        self.button.setFocusPolicy(Qt.NoFocus) 
        #按钮位置
        self.button.move(40, 20) 
        #按钮绑定方法
        self.button.clicked.connect(self.showDialog) 
        self.setFocus()
        self.widget = QWidget(self) 
        self.widget.setStyleSheet('QWidget{background-color:%s} '%color.name()) 
        self.widget.setGeometry(130, 22, 200, 100) 
        
    def showDialog(self): 
        col = QColorDialog.getColor() 
        print(col.name(),"\n")
        if col.isValid(): 
            self.widget.setStyleSheet('QWidget {background-color:%s}'%col.name()) 
    
if __name__ == "__main__": 
    app = QApplication(sys.argv) 
    qb = ColorDialog() 
    qb.show()
    sys.exit(app.exec_())