Have you ever wanted your python program to ask ... is nothing but a string you put inside the input function that is to be displayed to the user to let him/her know what is the program asking for.

A dictionary in python is a datatype that allows storing the data ... we have just displayed the operations that our project supports. Then we take the operator as input. Next, we take the two numbers ...

Python, for all its power ... then use the values to take an action—e.g., store a function as a value and use the key or some other variable as input. In many cases this works well, but can ...