import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

class ToolBarDemo(QMainWindow):
  def __init__(self,parent=None):
    super(ToolBarDemo, self).__init__(parent)
    #设置标题与初始大小
    self.setWindowTitle('toolbar例子')
    self.resize(300,200)

    #垂直布局
    layout=QVBoxLayout()

    #在工具栏区域添加文件工具栏
    tb=self.addToolBar('File')
    #添加图形按钮
    new=QAction(QIcon('images\\new.png'),'new',self)
    tb.addAction(new)
    open=QAction(QIcon('images\open.png'),'open',self)
    tb.addAction(open)
    save=QAction(QIcon('images\save.png'),'save',self)
    tb.addAction(save)

    #图形对象点击触发自定义槽函数
    tb.actionTriggered[QAction].connect(self.toolbtnpressed)

    self.setLayout(layout)

  def toolbtnpressed(self,a):
    #输出，点击地图性按钮
    print('pressed tool button is ',a.text())
if __name__ == '__main__':
  app=QApplication(sys.argv)
  demo=ToolBarDemo()
  demo.show()
  sys.exit(app.exec_())

 tb=self.addToolBar('File')

new=QAction(QIcon('images\\new.png'),'new',self)
    tb.addAction(new)
    open=QAction(QIcon('images\open.png'),'open',self)
    tb.addAction(open)
    save=QAction(QIcon('images\save.png'),'save',self)
    tb.addAction(save)

tb.actionTriggered[QAction].connect(self.toolbtnpressed)