网格布局

import sys
from PyQt4 import QtCore, QtGui

class MainWindow(QtGui.QWidget):
    
    def __init__(self, parent = None):
        QtGui.QWidget.__init__(self)
        self.setWindowTitle('grid layout')
        
        names = ['Cls', 'Bck', '','Close', '7', '8', '9', '/', '4', '5', '6', '*', '1', '2', '3','-','0','.', '=', '+']
        
        grid = QtGui.QGridLayout() # 创建一个网格布局
        
        j = 0
        pos = [(0,0), (0,1), (0,2), (0,3),
               (1,0), (1,1), (1,2), (1,3),
               (2,0), (2,1), (2,2), (2,3),
               (3,0), (3,1), (3,2), (3,3),
               (4,0), (4,1), (4,2), (4,3)]
       
        
        for i in names:
            button = QtGui.QPushButton(i)
            if j == 2:
                grid.addWidget(QtGui.QLabel(''), 0, 2) # 填补Back和Close按钮之间的空格，使用QLabel部件
            else:
                grid.addWidget(button, pos[j][0], pos[j][1]) # 使用addWidget()方法，将部件添加到网格布局中
            j = j + 1
            
        self.setLayout(grid)
                 
        
app = QtGui.QApplication(sys.argv)
main = MainWindow()
main.show()
sys.exit(app.exec_())