Let’s the user choose which topic they would like to complete and the difficulty they wish to complete this topic in.

It will display a range of questions about the topic the user has chosen to do based on the difficulty.

Once run, the two variables ‘options’ and difficulty’ will print out onto python, the topics and difficulty. Once given an input, the program displays a ‘KeyError’. For example when I input ‘a’ (arithmetic) and ‘e’ (easy) it will not display the questions for arithmetic but instead this KeyError. How would I overcome this KeyError?

```
options = input("Choose 'a' for arithmetic or 'c' for computing: ")
difficulty = input("Choose 'e' for easy , 'm' for medium , 'h' for hard: ")
mapping = {'a': {
'e': "What is 4+4?",
'm': "What is 8x8+4-2?",
'h': "What is 8+4+3-2x8+2?"
}}
mapping2 = {'c': {
'e': "What is code?",
'm': "What is the IBM primarily used for?",
'h': "State the differences between Binary and Hex values?"
}}
question = mapping[options][difficulty]
moreQuestion = mapping2[options][difficulty]
answer = int(input(question))
```