The Secret Python Operator No One Talks About

[Naegimaggu]

I've never understood what's the point of writing this kind of esoteric syntax to avoid a very basic, fast to read and easy to understand control structure, unless it's for performance gains.

[harelsegev]

The magic operator here isn't the walrus, it's "or". Return primary if primary evaluates to True, else return backup. This "or" is what eliminates the separate assignment

[subhankarsamanta]

Thank you!
I didn't know it. Thanks for sharing this outstanding Python operator.😊

[keneola]

Man! C#'s coalesce operator (?? or ??=) seems so much cleaner.

[lebenet]

funny how this doesn't need a new operator in other languages but python decided to be different

[dalistrata]

once you know learn the walrus, this does make more sense. a lot more. it is not two separate ideas, but one. the variable we set and the way it is handled are shown together.

[wartem]

"if user := (primary or backup or None):" to make it the same as the original solution

[nesicvojin]

This wasnt the best example. Lets say you have a function that checks if your string input is an intager. If it is, return the number, if it isnt, return false. Now, you can write:
if n := checkInt(s):
print(n)
else:
print("It's not an int")

Instead of:
n = checkInt(s)
if n:
...

I have used this operator a lot while working with sockets (when i want to use a recieved message only if it exists), but I'm sure you can find some use for it😊

[josephvictory]

Usually i write it as bool

User = primary or secondary

[udbhavshrivastava]

I really like the name because its just so memorable lol

[srepinS]

And how is this better? Unless your doing some only this many lines to write this program challenge

[FabioGamingFG]

Please stop checking for null as if the value you're checking is a boolean

[trietang]

I like Ben, suprised by the collab lol.

[bobDotJS]

Didn't Guido Van Rossum leave the python foundation over this?

[asagiai]

Does that mean "" will also work as a user?
Also, doesn't other PL already have something like this, too?

[ajhaykumar.n]

Is it like ternary operator on other languages?

[Germisstucklmao]

Would have been better if there was a ternary operator

[warguy]

does this not work
user = user if user else primary

[terabhaininja]

can't just do this?

if user in {primary, backup}:
print ("success.")

else:
print("failure.")

[JohnDoe-vod]

People getting mad they cant understand simple logic