Lets say I have a list of tuples, and by calling sort where key = first element, our list comes back as:
[(1, 'e'), (2, 'd'), (3, 'c'), (3, 'a'), (3, 'b'), (4, 'f')]
Now, how do I apply a sort that applies only to those values where the first values match, (in this case, the three values that have first element as 3), so that the final list is:
[(1, 'e'), (2, 'd'), (3, 'a'), (3, 'b'), (3, 'c'), (4, 'f')]
I have applied a sort to the first element, but when I apply a sort to the second element, the first sort becomes undone. I would like to keep the original sort, and change ONLY those elements with duplicate first elements.
Thank you!
>Solution :
The default .sort() method in Python already does this. For example, the code:
L = [(1, 'e'), (2, 'd'), (3, 'c'), (3, 'a'), (3, 'b'), (4, 'f')]
L.sort()
print(L)
Returns [(1, 'e'), (2, 'd'), (3, 'a'), (3, 'b'), (3, 'c'), (4, 'f')] which is what you want