Stuck on input-output evaluation YAML-file

[antonthys]

Hi,

I'm struggling with creating a correct suite.yaml file for evaluation of an programming exercise where the students are asked to make a code that calculates the area of a trapezoid based on 3 inputs:

a = int(input("length of long base: "))
b = int(input("length of short base: "))
h = int(input("height of trapezium"))
area = 0.5*(a+b)*h
print(area)

As you can see python asks the user for 3 inputs. I tried creating a suite.yaml file with 1 test as follows:

- tab: oppervlakte-trapezium
  testcases:
    - stdin: "1", "2", "3"
      stdout: 4.5

but this clearly doesn't work because of the stdin: "1", "2", "3".

I have no idea how to fix this error though? Any ideas how to write a correct yaml-file that would work for this code?

Many thanks in advance!

[niknetniko]

The input() function in Python always reads a single line from stdin. This means that if you want to pass three inputs, you need to put three lines on stdin:

- tab: oppervlakte-trapezium
  testcases:
    - stdin: |
        1
        2
        3
      stdout: 4.5

The | in YAML is a special syntax to write multiple lines. Alternatively, you can be explicit:

- tab: oppervlakte-trapezium
  testcases:
    - stdin: "1\n2\n3"
      stdout: 4.5

[antonthys]

This works 👍 Thank you very much for your quick reply!