Python - Single Line Conditional syntax error? [duplicate]

Question

I'm testing this to count the number of even numbers vs the number of odd numbers in the first 3 elements of an array.

This works:

 for i in range(3):
    if int(numbers[i]) % 2 == 0:
        ev +=1
    else:
        od +=1
    print(ev, od)

But this gives me an error:

for i in range(3):
        ev += 1 if numbers[i] % 2 == 0 else od += 1
        print(ev, od)

ev += 1 if numbers[i] % 2 == 0 else od += 1
                                            ^
SyntaxError: invalid syntax

Any ideas?

wizzwizz4 · Accepted Answer · 2018-08-24 15:31:24Z

1

Inline if/else is for values. So, in the else case, it's reading as:

ev += od += 1

That doesn't make sense. In this case, inline if/else, aka the ternary conditional, is not appropriate.

answered Aug 24, 2018 at 15:31

wizzwizz4

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