def initUI(self):
grid = QGridLayout()
addButton = QPushButton('+', self)
addButton.clicked.connect(self.add)
#grid.addWidget(addButton, 0, 1)
addButton.setGeometry(200, 150, 100, 300)
addButton.SetIconSize(QSize(100, 100))
addButton.setIcon(QIcon('logo.png'))
subButton = QPushButton('-', self)
subButton.clicked.connect(self.sub)
grid.addWidget(subButton, 1, 1)
mulButton = QPushButton('*', self)
mulButton.clicked.connect(self.mul)
grid.addWidget(mulButton, 2, 1)
divButton = QPushButton('/', self)
divButton.clicked.connect(self.div)
grid.addWidget(divButton, 3, 1)
self.var1 = QLineEdit(self)
grid.addWidget(self.var1, 1, 0)
self.var2 = QLineEdit(self)
grid.addWidget(self.var2, 2, 0)
self.ans = QLabel('asd', self)
grid.addWidget(self.ans, 4, 0, 1, 2, Qt.AlignCenter)
self.setLayout(grid)
self.show()
