Underscores Can Do What?! #python #programming #coding

This short video shows you 3 helpful tips using underscores in Python!

Background Music:
Attribution 4.0 International (CC BY 4.0)

[DSamp]

Note that because both are based on conventions, you cannot combine tip 2 and 3: As long as a global variable called _ is defined, the interactive prompt does *not* overwrite it with the last result. You can either unassign it (del _) or use a different name like "_unused" to restore that behavior.

[theminecommander]

That's really cool! I'll be using these!

[GamingAbroad]

I didnt know the 3rd thats a game changer

[prod_joel.]

Did not knew these. The underscore with numbers will be a game changer for me

[lukaschumchal]

Thank. Nice video. I am always surprised how useful separating digits with underscore can be. However I haven't had chance to see it in real code.

[open]

# Tip 1.1 Improve the readability of large printed numbers:

>>>print(f"{c:_}")
299_792_458

[NFSHeld]

The second method is called a "discard variable". It does exist in C# as well and (opposed to other variables in C#) does not need to be defined.

As a side note, defining the age AND the year of birth is often questionable design, unless you explicitly need both values all the time :D In most cases giving the exact birth date is better when possible.

[Iam_Qachal]

The 2nd method is especially useful when you're tuple unpacking dictionaries.

[bakedgiraffe]

Lua also uses throwaway underscores btw

[fabiosoares]

Tip number 1 was unknown to me. Thx a lot

[beclops]

All of these except the 3rd apply in Swift as well if anybody’s learning that

[jeffery_tang]

U forgot one more which is using two _ before private method names

[WSpe]

for _ in range(x). If variable is not needed.

[ThisIsEndlessVoid]

I tested that second one also works in Lua

[BlueSheep]

Super useful! Btw what font are you using?

[RealQuarlie]

I trust nobody that would write 2_000 instead of 2000

[shikharmishra]

Have you maded a video on why Binary has 0b, hex has 0X similary with Octal?!

[PattyManatty]

One that was missed here is that members of a module that start with an underscore, are not imported when you import * from a module.

That makes variables that start with an underscore "private" in some sense

[codaaaaaaaaa]

How is the last taking 0.3 seconds? That’s long enough to actually slow you down

[_Elvyra._]

til you can use the unpacking operator in the middle