Python Tutorial: For Loop vs Map vs List Comprehensions

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Python Tutorial: For Loop vs Map vs List Comprehensions

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4 жыл бұрын

Python Tutorial: For Loop vs Map vs List Comprehensions
In this python tutorial for beginners, I talk about the difference between using a for loop, the map function, and list comprehension to modify and return a new list. Mapping over arrays is something we do in programming all the time, and there are different ways to achieve the same result. It's good to know all the different ways you can do it in python.
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Пікірлер: 17

@kylemueller 3 жыл бұрын

If you want to unbind a map object and put it in a list, you can use the following shorter syntax: [*map(fn,lst)] You can do the essentially the same thing if you want to put it in a set: {*map(fn,lst)} Extra tip: You can print line by line with map: [*map(print,lst)] It doesn't look like it should work, but it does. Pretty cool, right?

@WebDevCody 3 жыл бұрын

That’s neat, I’ll have to check it out

@ninesquared81 3 жыл бұрын

You don't actually need a lambda to call the capitalize method in the map function. If you write it in the form str.capitalize, it will call the capitalize method from the built-in str class on each object in the list. It's a lot neater and probably quicker because you don't have to mess around with lambdas.

@kylemueller 3 жыл бұрын

I was just going to comment this lol. Good thing I checked first

@ironmonkey1990 4 күн бұрын

thank you!

@orion_222 4 жыл бұрын

great vid man. you'll be famous one day no cap

@snake1625b 6 ай бұрын

Nice video. Have you noticed the industry lean more towards map over list comprehension

@filmfloyd8751 3 жыл бұрын

man you are the best

@ianpan0102 4 жыл бұрын

To disable the popups that kept coming up (as you mentioned yourself), set "editor.parameterHints.enabled": false

@WebDevCody 4 жыл бұрын

I'll check that out, thanks for the tip!

@BrendanMetcalfe 4 жыл бұрын

Nice video!

@WebDevCody 4 жыл бұрын

Glad you enjoyed it

@simenandreasknudsen9272 3 жыл бұрын

This is great, thanks! I find the List Comprehensions to be the most understandable. Are there any speed difference between those? Like if you wanted to make a project run as smoothly and fast as it can

@WebDevCody 3 жыл бұрын

I doubt there is much speed difference and I’d assume python would do some performance for tuning under the hood regardless of your iteration approach, but the best way is to test it out yourself

@simenandreasknudsen9272 3 жыл бұрын

@@WebDevCody thanks man!