Calculating BLEU scores in Python

[kg17]

Dear all,
Wondering if anyone has ever had any experience with calculating BLEU scores for evaluating machine translation quality?
I want to compare machine-translated text to a human translation reference and have found the code to calculate this here: https://github.com/vikasnar/Bleu
I have visual studio code, but I have absolutely no idea what I am doing and have absolutely no experience with programming. There is a test set on the code, but I cannot seem to figure out how to even input this or run this.
Is anyone able to help/offer a programming for dummies explanation of how to calculate this test set?
I would be very grateful!

Thanks in advance!

[Gribouillis]

If I understand well how the program works, you don't need any programming experience to use it as a black box:

1. Create a file machine-translated.txt containing the machine translation of some text.
   
2. Create a directory containing one or more human translations of the same text, say human-translated-1.txt, human-translated-2.txt etc.
   
3. Run the command python calculatebleu.py machine-translated.txt path-to-directory
   
4. Then read the contents of the new file bleu_output.txt