pip install pyqt5

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
Py40.com PyQt5 tutorial 
 
In this example, we create a simple
window in PyQt5.
 
author: Jan Bodnar
website: py40.com 
last edited: January 2015
"""
 
import sys
 
#這里我們提供必要的引用。基本控件位于pyqt5.qtwidgets模塊中。
from PyQt5.QtWidgets import QApplication, QWidget
 
 
if __name__ == '__main__':
 #每一pyqt5應(yīng)用程序必須創(chuàng)建一個(gè)應(yīng)用程序?qū)ο?。sys.argv參數(shù)是一個(gè)列表，從命令行輸入?yún)?shù)。
 app = QApplication(sys.argv)
 #QWidget部件是pyqt5所有用戶界面對(duì)象的基類。他為QWidget提供默認(rèn)構(gòu)造函數(shù)。默認(rèn)構(gòu)造函數(shù)沒(méi)有父類。
 w = QWidget()
 #resize()方法調(diào)整窗口的大小。這離是250px寬150px高
 w.resize(250, 150)
 #move()方法移動(dòng)窗口在屏幕上的位置到x = 300，y = 300坐標(biāo)。
 w.move(300, 300)
 #設(shè)置窗口的標(biāo)題
 w.setWindowTitle('Simple')
 #顯示在屏幕上
 w.show()
 
 #系統(tǒng)exit()方法確保應(yīng)用程序干凈的退出
 #的exec_()方法有下劃線。因?yàn)閳?zhí)行是一個(gè)Python關(guān)鍵詞。因此，exec_()代替
 sys.exit(app.exec_())

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
py40 PyQt5 tutorial 
 
This example shows an icon
in the titlebar of the window.
 
author: Jan Bodnar
website: py40.com 
last edited: January 2015
"""
 
import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QIcon
 
 
class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  
  self.initUI() #界面繪制交給InitUi方法
  
  
 def initUI(self):
  #設(shè)置窗口的位置和大小
  self.setGeometry(300, 300, 300, 220) 
  #設(shè)置窗口的標(biāo)題
  self.setWindowTitle('Icon')
  #設(shè)置窗口的圖標(biāo)，引用當(dāng)前目錄下的web.png圖片
  self.setWindowIcon(QIcon('web.png'))  
  
  #顯示窗口
  self.show()
  
  
if __name__ == '__main__':
 #創(chuàng)建應(yīng)用程序和對(duì)象
 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_()) 

class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  ...

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
Py40 PyQt5 tutorial 
 
This example shows a tooltip on 
a window and a button.
 
author: Jan Bodnar
website: py40.com 
last edited: January 2015
"""
 
import sys
from PyQt5.QtWidgets import (QWidget, QToolTip, 
 QPushButton, QApplication)
from PyQt5.QtGui import QFont 
 
 
class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  
  self.initUI()
  
  
 def initUI(self):
  #這種靜態(tài)的方法設(shè)置一個(gè)用于顯示工具提示的字體。我們使用10px滑體字體。
  QToolTip.setFont(QFont('SansSerif', 10))
  
  #創(chuàng)建一個(gè)提示，我們稱之為settooltip()方法。我們可以使用豐富的文本格式
  self.setToolTip('This is a <b>QWidget</b> widget')
  
  #創(chuàng)建一個(gè)PushButton并為他設(shè)置一個(gè)tooltip
  btn = QPushButton('Button', self)
  btn.setToolTip('This is a <b>QPushButton</b> widget')
  
  #btn.sizeHint()顯示默認(rèn)尺寸
  btn.resize(btn.sizeHint())
  
  #移動(dòng)窗口的位置
  btn.move(50, 50)  
  
  self.setGeometry(300, 300, 300, 200)
  self.setWindowTitle('Tooltips') 
  self.show()
  
  
if __name__ == '__main__':
 
 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_())

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
Py40 PyQt5 tutorial 
 
This program creates a quit
button. When we press the button,
the application terminates. 
 
author: Jan Bodnar
website: py40.com 
last edited: January 2015
"""
 
import sys
from PyQt5.QtWidgets import QWidget, QPushButton, QApplication
from PyQt5.QtCore import QCoreApplication
 
 
class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  
  self.initUI()
  
  
 def initUI(self):    
  
  qbtn = QPushButton('Quit', self)
  qbtn.clicked.connect(QCoreApplication.instance().quit)
  qbtn.resize(qbtn.sizeHint())
  qbtn.move(50, 50)  
  
  self.setGeometry(300, 300, 250, 150)
  self.setWindowTitle('Quit button') 
  self.show()
  
  
if __name__ == '__main__':
 
 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_())

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
ZetCode PyQt5 tutorial 
 
This program shows a confirmation 
message box when we click on the close
button of the application window. 
 
author: Jan Bodnar
website: zetcode.com 
last edited: January 2015
"""
 
import sys
from PyQt5.QtWidgets import QWidget, QMessageBox, QApplication
 
 
class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  
  self.initUI()
  
  
 def initUI(self):    
  
  self.setGeometry(300, 300, 250, 150)  
  self.setWindowTitle('Message box') 
  self.show()
  
  
 def closeEvent(self, event):
  
  reply = QMessageBox.question(self, 'Message',
   "Are you sure to quit?", QMessageBox.Yes | 
   QMessageBox.No, QMessageBox.No)
 
  if reply == QMessageBox.Yes:
   event.accept()
  else:
   event.ignore()  
  
  
if __name__ == '__main__':
 
 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_())

reply = QMessageBox.question(self, 'Message',
 "Are you sure to quit?", QMessageBox.Yes | 
 QMessageBox.No, QMessageBox.No)

if reply == QtGui.QMessageBox.Yes:
 event.accept()
else:
 event.ignore() 

#!/usr/bin/python3
# -*- coding: utf-8 -*-
 
"""
Py40 PyQt5 tutorial 
 
This program centers a window 
on the screen. 
 
author: Jan Bodnar
website: py40.com 
last edited: January 2015
"""
 
import sys
from PyQt5.QtWidgets import QWidget, QDesktopWidget, QApplication
 
 
class Example(QWidget):
 
 def __init__(self):
  super().__init__()
  
  self.initUI()
  
  
 def initUI(self):    
  
  self.resize(250, 150)
  self.center()
  
  self.setWindowTitle('Center') 
  self.show()
  
 
 #控制窗口顯示在屏幕中心的方法 
 def center(self):
  
  #獲得窗口
  qr = self.frameGeometry()
  #獲得屏幕中心點(diǎn)
  cp = QDesktopWidget().availableGeometry().center()
  #顯示到屏幕中心
  qr.moveCenter(cp)
  self.move(qr.topLeft())
  
  
if __name__ == '__main__':
 
 app = QApplication(sys.argv)
 ex = Example()
 sys.exit(app.exec_())