Perform addition and subtraction using CherryPy

Last Updated : 01 Oct, 2020

CherryPy also known as a web application library is a Python web framework that provides a friendly interface to the HTTP protocol for Python developers. It allows developers to build web applications the same way as in traditional object-oriented Python programs. Thereby, resulting in smaller source code developed in no time.

This framework is mainly for the developers who want to create a portable database-driven web application using Python, as it provides Create, Retrieve, Update and Delete functionalities.

The basic requirements for the installation of CherryPy include:

Python with version 2.4 or above
Cherrypy 3.0

Installation

To install cherrypy run the following command in terminal:

pip install cherrypy

Approach:

Create user interface to take input from user.
Write cherrypy program to perform required operations

HTML code to take input from the user-

HTML

<html>
<head>
 
  </head>
<body>

  <div class="container">  
    <h2><u><i>Operation</i></u></h2>
    <form action="store" id="form" method="GET">
    <input type="number" name="number1" /><br />
    <input type="number" name="number2" /><br />


    <input style="margin-left: 250px;" id=" submit" type="submit"/></div>
  </div>    
    </form>
  </div>
            
</body>
</html>

Cherrypy code for addition

Python3

import cherrypy


class Root(object):
   
    @cherrypy.expose
    def index(self):
        return """<html>
<head>
 
  </head>
<body>

  <div class="container">  
    <h2><u><i>Addition</i></u></h2>
    <form action="store" id="form" method="GET">
    <input type="number" name="number1" /><br />
    <input type="number" name="number2" /><br />


    <input style="margin-left: 250px;" id=" submit" type="submit"/></div>
  </div>    
    </form>
  </div>
            
</body>
</html>"""
   
    
    @cherrypy.expose
    def store(self, number1, number2):
        num1=int(number1)
        num2=int(number2)
        answer=num1+num2
      
        out= """<html>
        <body>
        
        
<p> Sum: %s</p>

       
        
        <a style="color:red; font-size:35px;" id="shutdown"; href="./shutdown"><i>Shutdown Server</i></a>
        </body>
        </html>
        
        """
       
        return out % (str(answer))
  
    
    @cherrypy.expose
    def shutdown(self):
        cherrypy.engine.exit()

if __name__=="__main__":
    cherrypy.config.update({'server.socket_port': 8087})
    
    cherrypy.quickstart(Root())

Output:

Code for subtraction

Python3

import cherrypy


class Root(object):
   
    @cherrypy.expose
    def index(self):
        return """<html>
<head>
 
  </head>
<body>

  <div class="container">  
    <h2><u><i>Subtraction</i></u></h2>
    <form action="store" id="form" method="GET">
    <input type="number" name="number1" /><br />
    <input type="number" name="number2" /><br />


    <input style="margin-left: 250px;" id=" submit" type="submit"/></div>
  </div>    
    </form>
  </div>
            
</body>
</html>"""
   
    
    @cherrypy.expose
    def store(self, number1, number2):
        num1=int(number1)
        num2=int(number2)
        answer=num1-num2
      
        out= """<html>
        <body>
        
        
<p> Result: %s</p>

       
        
        <a style="color:red; font-size:35px;" id="shutdown"; href="./shutdown"><i>Shutdown Server</i></a>
        </body>
        </html>
        
        """
       
        return out % (str(answer))
  
    
    @cherrypy.expose
    def shutdown(self):
        cherrypy.engine.exit()

if __name__=="__main__":
    cherrypy.config.update({'server.socket_port': 8087})
    
    cherrypy.quickstart(Root())