Python 3.7 does not support assignment expressions

Question

I have the following code:

n = int(input())
a, b, c = map(int, input().split())
result = sum(s // c + 1 for i in range(n) for j in range(n - a * i) if (s := n - a * i - b * j - 1) >= 0)
print(result)

But I have an error that Python 3.7 does not support assignment expressions in this part (s := n - a * i - b * j - 1). How can I rewrite it? I want to rewrite it to python3.7

question from:https://stackoverflow.com/questions/65926972/python-3-7-does-not-support-assignment-expressions

Answer 1

The simple, though repetitive, fix is to "inline" the value of s.

result = sum((n - a * i - b * j - 1) // c + 1 
              for i in range(n) 
              for j in range(n - a * i) if n - a * i - b * j - 1 >= 0)