Discussion on: 3 Common Mistakes that Python Newbies Make

[Ryan Palo]

I personally agree. This example is probably one Boolean too long for a one-liner. I just wanted to show that technique. For some reason, most people I mentor can understand the one-liner better. I don’t know why. Maybe it’s easier for them to understand than inverting the order of comparisons in their head.

[Valentin Berlier]

Using the expression and putting it in its own function is usually pretty clear. It lets you give a label to the condition. You can also put each comparison on its own line if the expression is too long.

def is_leap_year(year):
    return (
        year % 4 == 0
        and (
            year % 100 != 0 
            or year % 400 == 0
        )
    )

The logical operators stand out more when they're at the beginning of a line.

[Miguel Ruiz]

I agree too