在一行 if-else 语句中赋值给变量

Question

I want to assign to global variable in a one line if-else statement

The statement in one line:

wins += 1 if num > num2 else lose += 1;

I get invalid syntax error, with one line.

The original statement is working:

if num > num2:
    wins += 1
else:
    lose += 1  

I'm using more than 5000 statements, each one line and separate with semicolon ; to make it all one line.

Answer 1

Assignments are statements, not expressions, and as such they cannot be part of a conditional expression . You can do it in one line, though, even if that is not an end in itself:

wins, lose = wins + (num > num2), lose + (num <= num2)

or with an assignment expression:

wins, lose = wins + (w := num > num2), lose + (not w)

Answer 2

You can do it in one line as assignment expressions with the walrus ( := ) operator (Python 3.8+):

(wins := wins + 1) if num > num2 else (lose := lose + 1)

but it doesn't make much sense to. You're modifying two different objects, and trying to cram both into one statement isn't especially logical.

The 4-line version is perfectly reasonable.