pyqt5 realize drop-down menu + open file sample code

# -*- coding: utf-8 -*-
import sys
import os
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5 import QtCore, QtGui, QtWidgets
 
from  import QRect, QSize, QMetaObject, QCoreApplication,\
  QPropertyAnimation
from  import QFont
from  import QFileDialog
from  import QWidget, QHBoxLayout, QGridLayout, QPushButton,\
  QApplication, QMainWindow
 
class Ui_MainWindow(object):
  def setupUi(self, MainWindow):
    ("MainWindow")
    (800, 681)
    ((0, 651))
    ("background-image: url(:/new prefix (linguistics)/);")
     = (MainWindow)
    ("centralwidget")
     = ()
    ((0, -580, 195, 631))
    ("widget")
     = ()
    ((0, 0, 195, 581))
    (True)
    ("scrollArea")
     = ()
    ((0, 0, 178, 681))
    ((177, 681))
    ("scrollAreaWidgetContents")
     = ()
    ((0, -10, 181, 691))
    ("verticalLayoutWidget")
     = ()
    (0, 0, 0, 0)
    (20)
    ("verticalLayout")
    self.pushButton_2 = ()
    self.pushButton_2.setObjectName("pushButton_2")
    (self.pushButton_2)
    self.label_2 = ()
    self.label_2.setObjectName("label_2")
    (self.label_2)
    self.pushButton_4 = ()
    self.pushButton_4.setObjectName("pushButton_4")
    (self.pushButton_4)
    self.label_3 = ()
    self.label_3.setObjectName("label_3")
    (self.label_3)
    self.pushButton_7 = ()
    self.pushButton_7.setObjectName("pushButton_7")
    (self.pushButton_7)
    self.label_4 = ()
    self.label_4.setObjectName("label_4")
    (self.label_4)
    self.pushButton_6 = ()
    self.pushButton_6.setObjectName("pushButton_6")
    (self.pushButton_6)
    self.label_5 = ()
    self.label_5.setObjectName("label_5")
    (self.label_5)
    self.pushButton_5 = ()
    self.pushButton_5.setObjectName("pushButton_5")
    (self.pushButton_5)
    self.label_6 = ()
    self.label_6.setObjectName("label_6")
    (self.label_6)
     = ()
    ("pushButton")
    ()
    self.label_7 = ()
    self.label_7.setObjectName("label_7")
    (self.label_7)
    ()
     = ()
    ((50, 580, 61, 32))
    ("border-image: url(:/new prefix (linguistics)/);")
    ("")
    ("closeButton")
     = ()
    ((50, 0, 61, 32))
    ("border-image: url(:/new prefix (linguistics)/);")
    ("")
    ("openButton")
     = ()
    ((0, 0, 801, 641))
    ("graphicsView")
    .raise_()
    .raise_()
    .raise_()
    ()
     = (MainWindow)
    ((0, 0, 800, 22))
    ("menubar")
     = ()
    ("menu")
    ()
     = (MainWindow)
    ("statusbar")
    ()
     = (MainWindow)
    ("action")
    self.action_2 = (MainWindow)
    self.action_2.setObjectName("action_2")
    self.action_3 = (MainWindow)
    self.action_3.setObjectName("action_3")
    ()
    (self.action_2)
    (self.action_3)
    (())
 
    (MainWindow)
    (MainWindow)
 
  def retranslateUi(self, MainWindow):
    _translate = 
    (_translate("MainWindow", "MainWindow"))
    self.pushButton_2.setText(_translate("MainWindow", "PushButton"))
    self.label_2.setText(_translate("MainWindow", "TextLabel"))
    self.pushButton_4.setText(_translate("MainWindow", "PushButton"))
    self.label_3.setText(_translate("MainWindow", "TextLabel"))
    self.pushButton_7.setText(_translate("MainWindow", "PushButton"))
    self.label_4.setText(_translate("MainWindow", "TextLabel"))
    self.pushButton_6.setText(_translate("MainWindow", "PushButton"))
    self.label_5.setText(_translate("MainWindow", "TextLabel"))
    self.pushButton_5.setText(_translate("MainWindow", "PushButton"))
    self.label_6.setText(_translate("MainWindow", "TextLabel"))
    (_translate("MainWindow", "PushButton"))
    self.label_7.setText(_translate("MainWindow", "TextLabel"))
    (_translate("MainWindow", "Human Brain Architecture Analysis"))
 
    (_translate("MainWindow", "Import Matrix"))
    self.action_2.setText(_translate("MainWindow", "Exit the system."))
    self.action_3.setText(_translate("MainWindow", "Developer Information"))
 
 
class Window(QMainWindow, Ui_MainWindow):
  def __init__(self, *args, **kwargs):
    super(Window, self).__init__(*args, **kwargs)
 
 
    (self)
     = QPropertyAnimation(, b"geometry") # Hidden controls behind
    (1000) # 1s
    (QRect(0, 30, 178, 681)) # It's just the x-coordinate that changes
 
    # Move in animation
     = QPropertyAnimation(, b"geometry") # Hidden controls behind
    (1000) # 1s
    (QRect(0, -580, 178, 681))
    ()
 
    # Bind open close events
    ()
    ()
 
    # Open the file
    ()
    ('Import Matrix')
    ('Ctrl+Q')
 
    # Exit the system
    self.action_2.()
    self.action_2.setStatusTip('Exit the system')
    self.action_2.setShortcut('Ctrl+E')
 
    #Developer Information
    self.action_3.setStatusTip('Tang Weize Xie Jiake 2016.12.3')
 
  def onOpen(self):
    # Set button invisible
    (False)
    (True) # Behind the controls to be pulled out are visible
    ((195, 1, 611, 641))
    () # Turn on animation effects
 
  def onClose(self):
    () # Stop if it moves halfway
    () # Back it up
 
  def onFinish(self): # Close the end of the animation
    (False)
    (True)
    ((0, 0, 801, 641))
 
  def openFile(self):
    fileName1, filetype = (self,"Selected documents","/Users/Kelisiya/Desktop","All Files (*);;Text Files (*.txt)")
    print(fileName1, filetype)
 
 
 
if __name__ == "__main__":
  import sys
  app = QApplication()
  w = Window()
  ()
  (app.exec_())