It is not really possible, since apple = 10 is not a variable, it is whole piece of code
But by some complicated string operations You actually can do it, I don’t think it is worth it.
It would be easier to do it other way : convert variable from dictionary into string for description.
It would go like this :
var fruits = {apple:10, banana : 25, grape : 12 }
for x in fruits.keys() :
var descriptiontext = x + " = " + str(fruits)