Giving all possible values to four different variables

[quest_]

The most obvious way (and ugliest, I guess):

>>> for a in range(11):
...     for b in range(11):
...         for c in range(11):
...             for d in range(11):
...                 if a+b+c+d == 10:
...                     print(a/10, b/10, c/10, d/10)

Thank you very much but I really do not want to use 4 for loop Because it is a part of a very long code and 4 for loop will make it code much more longer