PyQt5（4）同时设置图标和窗口位置和大小代码

import sys
from PyQt5.QtWidgets import QMainWindow,QApplication,QDesktopWidget
from PyQt5.QtGui import QIcon #图标

class FirstMainWin(QMainWindow):
    def __init__(self):
        super(FirstMainWin,self).__init__()
        self.setWindowTitle('主窗口')
        app.setWindowIcon(QIcon('./image/11.png'))#设置窗口图标
        self.setGeometry(300,300,250,700)  #设置窗口的位置和尺寸
if __name__=='__main__':  
    app=QApplication(sys.argv)
    main=FirstMainWin()
    main.show()    
    sys.exit(app.exec_())