How To Simplify Boolean Expressions // Python Tips

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[byte__]

In my opinion this applies only when you use type hints, so yeah most of the time. Even tho I like the pytonic way, sometimes I still find easier to read the more explicit way. Anyway good video

[Whatthetrash]

I like the videos overall, but disagree with this. As someone who's now getting neck-deep into Python, I like my code to be as explicit (and logical step-wise) as possible. So, if you have to <i>implicitly</i> understand something, that makes it less readable, not more so.

[POINTS]

This also makes the code more flexible. For example, should code need to support tickets set to None. The length check will not work with None but the "if tickets" works with lists, None, and other types.

[dmail]

For the example given I would go further. I use typehints and do not allow warnings, so I know the parameter is a list therefore I would not care if it was empty so remove the if statement altogether. The comment even says if it is empty don't do anything yet it prints to stdout.

[hankwikle]

I've seen a lot of people using a similar technique to check whether a particular variable is `None`, but that can be dangerous (for instance, numpy will throw an exception if you try this on an array). I'm inclined to be more explicit than what's demonstrated in the video.

[VaderFuntime]

One place where it can be dangerous is doing that on an integer to check whether it is None. The expression will value to False whether it's None, or 0.

[forsee]

Don't use that if tickets is not strictly typed. It can quickly go wrong if tickets is Optional (could be None).
Overall, as python dzen says, explicit is always better than implicit, you really gotta know all possible side effects of implicit conversions.

[reyjanson]

alternatively use for-else:
for ticket in tickets:
ticket.process()
else:
print("There are no tickets to process")

[sheanmassey]

Might be interesting to take it a step further here and implement the little known Python "for/else" statement.

[teprox]

In my opinion Shorts are not a good solution for your channel. I've to watch from the beginning to the end, cant jump to the point I want.

[PaCmEn]

Your statment won't work if you have one or more tickets.