How would I shorten this few lines of python code? [solved]

In python how can I shorten the code below?

if x == 15:
   y = 0
elif x == 14:
   y = 1
elif x == 13:
   y = 2
...
...
...
elif x == 0:
   y = 15

Currently the solutions I’ve gotten are

y = 15-x

and adding a dictionary.

>Solution :

There Is A Pattern Your Code if x = 15 then y = 0 and if x = 14 then y = 1.
If you just subtract x from 15 then you get the value of y.
There is an equation made (if you know about math):

x+y = 15
then,
y = 15 -x

This Is The Code.

x = #value you use
y = 15 -x