num_list = [22, 11, 33, 55, 44]
highest_number = num_list[0]
index = 0
for number in range(len(num_list)):
  if num_list[number] > highest_number:
    highest_number = num_list[number]
    index = number
print('The index of the highest value in num_list is: '+str(index))
I wrote my code in python 3.8. I hope this helps.