Python Set Trick? #code #programming #python

Python set trick? #code #programming #python

[prithviraje]

set_a^set_b

set_a.union(set_b)
set_a|set_b

set_a.intersection(set_b)
set_a&set_b

set_a.difference(set_b)
set_a-set_b

[Indently]

Want to have more fun? Copy and paste these into your Python script:

print(f'{set_a - set_b = }') # Exclusive to set a
print(f'{set_b - set_a = }') # Exclusive to set b
print(f'{set_a ^ set_b = }') # The difference in sets
print(f'{set_a & set_b = }') # Where the sets intersect
print(f'{set_a | set_b = }') # The sets combined

Don't forget to create:
set_a = {1, 2, 3}
set_b = {2, 3, 4}

[abdelmajidbadreddine]

That's called a symmetric difference operation that allows you to get the elements that are either in first_set or in second_set but not in both.

[lukaswieg]

Nice tip. Actually I think it would be beneficial if you also highlight the 'symetric_difference' method of sets. The ^ operator is nice for fast scripting, but if you see that in production code, it might be hard to understand. Especially if you are new to python.

[Infe]

This is why you should learn math prior to any programming. This is set theory XOR.

[lepe]

"Even after 3 years of working with Python I'm still learning new things"
3 years is not a lot. At all.

[parhamm]

the ^ works like XOR for example here if you put it in a variable like c and xor c and a you will get b and if you c^b you will get a

[AkivaB]

That's a symmetric difference and it uses the ^ because it's the XOR operator

[ItzPouriya]

Thanks for ur awesome tips!
i love ur videos specifically ur short videos, cuz u tell some useful tips that no one told us before ❤️
and what is ur pycharm theme?? did u download it?? or its new pycharm theme??

[xzex]

this is bitwise xor operator and depending on the object ( here sets / example of polymorphism) means what is in one that is not in the other : difference if it was 10 ^ 4 i think it must be 14 for x being 00001001 ^ = 0000 1110

[ventacode]

Kindly explain this
A = [ [], [] ] * 2
A[1].append(1)

then A = [ [], [1], [], [1] ]

I don't understand how this works !!

[WedgeDev]

Wait you started 3 years ago? Same! And yet your so much better than me...

[hedgehogfriend]

Its like bitwise operators. Didn't know you can use it with objects, but it makes sense. Those are still bits. I would say, that it works like this: All numbers inside the obj gets combined to a big bit. With each number it gets longer by 32 bits. Then the operator checks and gives you the numbers back. I dont know, but you could check it by just simply printing the set var as a bit 😊

[lamkhatinh]

set_a - set_b you will get elements appear in set_a but not appear in set_b

[abdultheseekerofknowledge]

Amazing, can we also do the same for list, dict?

[JhourladEstrella]

Took me 2 rewatch before I figured out that you mean "unique' values rather than "difference"

[manishreddy]

It only works when there are even number of occurances of an element like. This is because a^a=0 and this will not work if there are odd occurences eg.if there 2 occurs 3 times then it will still be included in the result

[quitethecontrary]

the ^ symbol is the XOR operator in python...

[_a_]

No offense but those are basics how can u learn it after 3 years

[DrDeuteron]

Hungarian notation is not pythonic, so replace set_a with a, and so on.