Simple calculator

Calculator/atharvavyas139/calculator.py

@@ -0,0 +1,82 @@
+'''
+Created on 12-Oct-2016
+
+@author: atharvavyas
+'''
+import sys
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+from decimal import Decimal
+class Window(QWidget):
+    def __init__(self,parent=None):
+        QWidget.__init__(self,parent)
+        self.grid=QGridLayout()
+        self.i1=QLabel("Input1")
+        self.i1.setAlignment(Qt.AlignCenter)
+        self.i2=QLabel("Input 2")
+        self.i2.setAlignment(Qt.AlignCenter)
+        self.in1=QLineEdit()
+        self.in2=QLineEdit()
+        self.in1.setValidator(QDoubleValidator(-100000,100000,4))
+        self.in2.setValidator(QDoubleValidator(-100000,100000,4))
+        self.grid.addWidget(self.i1,1,1,1,1)
+        self.grid.addWidget(self.in1,1,2,1,3)
+        self.grid.addWidget(self.i2,2,1,1,1)
+        self.grid.addWidget(self.in2,2,2,1,3)
+        self.b1=QPushButton("+")
+        self.b1.clicked.connect(self.cfunction)
+        self.b2=QPushButton("-")
+        self.b2.clicked.connect(self.cfunction)
+        self.b3=QPushButton("*")
+        self.b3.clicked.connect(self.cfunction)
+        self.b4=QPushButton("/")
+        self.b4.clicked.connect(self.cfunction)
+        self.b5=QPushButton("HCF")
+        self.b5.clicked.connect(self.cfunction)
+        self.b6=QPushButton("LCM")
+        self.b6.clicked.connect(self.cfunction)
+        self.grid.addWidget(self.b1,3,1)
+        self.grid.addWidget(self.b2,3,2)
+        self.grid.addWidget(self.b3,3,3)
+        self.grid.addWidget(self.b4,3,4)
+        self.grid.addWidget(self.b5,4,1,1,2)
+        self.grid.addWidget(self.b6,4,3,1,2)
+        self.i3=QLabel("Answer:")
+        self.i3.setAlignment(Qt.AlignCenter)
+        self.ans=QLineEdit();
+        self.grid.addWidget(self.i3,5,1,1,1)
+        self.grid.addWidget(self.ans,5,2,1,3)
+        self.setLayout(self.grid)
+        self.setGeometry(400,400,600,400)
+        self.setWindowTitle("Calculator")
+        self.icon=QIcon("favicon.ico")
+        self.setWindowIcon(self.icon)
+    def cfunction(self):
+        x=self.sender()
+        a=float(self.in1.text())
+        b=float(self.in2.text())
+        if x.text()=="+":
+            self.ans.setText(str(a+b))
+        elif x.text()=="-":
+            self.ans.setText(str(a-b))
+        elif x.text()=="*":
+            self.ans.setText(str(a*b))
+        elif x.text()=="/":
+            self.ans.setText(str(a/b))
+        elif x.text()=="HCF":
+            self.ans.setText(str(self.hcf(a,b)))
+        elif x.text()=="LCM":
+            self.ans.setText(str(self.lcm(a,b)))
+    def hcf(self,a,b):
+        if b==0:
+            return a
+        return self.hcf(b,a%b)
+    def lcm(self,a,b):
+        return (a*b)/(self.hcf(a,b))
+def perform():
+    app=QApplication(sys.argv)
+    window=Window()
+    window.show()
+    sys.exit(app.exec())
+if __name__=="__main__":
+    perform()