Argv – String into Integer

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sys.argv is indeed a list of strings. Use the int() function to turn a string to a number, provided the string can be converted.

You need to assign the result, however:

num1 = int(argv[1])
num2 = int(argv[2])

or simply use:

num1, num2 = int(num1), int(num2)

You did call int() but ignored the return value.

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