Tuple unpacking in for loops

Question

I stumbled across the following code:

for i,a in enumerate(attributes):
   labels.append(Label(root, text = a, justify = LEFT).grid(sticky = W))
   e = Entry         


        

Answer 1

[i for i in enumerate(['a','b','c'])]

Result:

[(0, 'a'), (1, 'b'), (2, 'c')]