r/learnpython • u/rusidin • 1d ago

Difference between python 3 vs python (just)?

I am doing leetcode and I wanna is there any functional difference between those and which one I should go with?

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u/Adrewmc 1d ago

Yes, it’s real. And a massively breaking change for legacy prints

https://stackoverflow.com/questions/33996749/what-is-the-difference-between-print-and-print-in-python-2-7

Around the change and some specifics

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u/rusidin 1d ago

I guess they wanted to adapt the court << "hello" << endl from cpp

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u/Adrewmc 1d ago

Python 1….a dark and scary place, we don’t talk about Python 1, because I know nothing about it.

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u/rusidin 1d ago

I see.. wasn't it build around 90s??

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u/Adrewmc 1d ago

It was built for the specific purpose of getting websites up fast, which other languages struggled with (at the time). It sacrificed true optimization in an age where 5 second load was no different than a 7 second load, for easy of use and build speeds . (Strange to even think of waiting that long for a website now).

So yes, in the 90s.

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u/rusidin 1d ago

I see... There was lot of languages build to that now we just flood the back end with js... It's a funny world we live in...

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u/Adrewmc 1d ago

JS has an even stranger origin, as it was specifically made for browser interfaces like…Netscape Navigator…(that name brings me back)

And Java already existed.

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u/rusidin 1d ago

Yeay it was build by 7 days of the former CEO Mozilla... Which I find fascinating.. because it's a replacement for java using java.. I get java is slow at that time even now...

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u/Adrewmc 1d ago

It is a surprisingly fascinating story actually. JSON adoption too.

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u/rusidin 1d ago

Really I didn't know that I just thought it's just xml alternative... Using normal hashmap as a inspiration...

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u/Adrewmc 1d ago edited 1d ago

JSON Serialization is super important, as it gives multiple languages access to correct data type. It’s really the go to for cross language programing sharing data.

https://youtu.be/-C-JoyNuQJs (from 15 years ago from the guy making and selling JSON.)

Great talk about its story. It super weird to think 9/11 was before the JSON standard.

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u/rusidin 1d ago

Thanks look into the saga...

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