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How To Create qr code Generator in Python

 You can create a QR code generator in Python using the qrcode library. Here's a basic example: import qrcode data = "Hello, world!" filename = "qrcode.png" # Generate QR code img = qrcode.make(data) # Save QR code image img.save(filename) In this example, we import the qrcode library and set the data that we want to encode in the QR code to "Hello, world!". We also specify the filename of the QR code image that we want to save. We then generate the QR code image using the qrcode.make() method, which takes the data as its argument. This method returns a PIL image object representing the QR code. Finally, we save the image to a file using the img.save() method, which takes the filename as its argument. You can customize the QR code by specifying additional options to the qrcode.make() method, such as the size and color of the QR code. Here's an example: import qrcode data = "Hello, world!" filename = "qrcode.png"
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Calculator Code in Python

 # define function for addition def add ( x, y ): return x + y # define function for subtraction def subtract ( x, y ): return x - y # define function for multiplication def multiply ( x, y ): return x * y # define function for division def divide ( x, y ): return x / y # main program print ( "Select operation." ) print ( "1.Add" ) print ( "2.Subtract" ) print ( "3.Multiply" ) print ( "4.Divide" ) # take input from the user choice = input ( "Enter choice (1/2/3/4): " ) num1 = float ( input ( "Enter first number: " )) num2 = float ( input ( "Enter second number: " )) if choice == '1' : print (num1, "+" , num2, "=" , add(num1, num2)) elif choice == '2' : print (num1, "-" , num2, "=" , subtract(num1, num2)) elif choice == '3' : print (num1, "*" , num2, "=" , multiply(num1, nu
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