Python 3 Tutorial for Beginners #21 - List Comprehensions

Hey gang, in this Python 3 tutorial I'll show you another way to create lists using list comprehensions.

----- COURSE LINKS:

---------------------------------------------------------------------------------------------
Other tutorials:

----- NODE.JS TUTORIALS

============== The Net Ninja =====================

================== Social Links ==================

[ozanmuyes]

Thanks for the video, a little addition to it; at 6:36-ish (in the comprehension method of even squared numbers) `[ num ** 2 for num in nums if num % 2 == 0 ]` will be sufficient (note no square calculation) because of an even number's square is going to be even too. Using Python (actually computers in general) for scientific purposes is not merely programming, it includes math also. Of course the method I'm talking about has too little impact on performance (it may well be negligible) for the sake of this tutorial but imagine the performance impact with big numbers.

[mulu]

oh man you are amazing :) keep it up. plus, you have gained a subscriber.

[abhayraghuvanshi]

you are really awesome ! love your videos

[petecodes]

One tip I'd give - try and work out the solution by pausing the video before Shaun explains it :)

[clawer]

For the squaring even numbers comprehension method, what's the purpose of the ( )'s in the IF statement. I've tried with your demonstrated ( )'s, without ( )'s, and even ( )'s including the % 2 == 0, which all seem to work. Again, my question is are the ( )'s even important to use in this situation?

[lardosian]

Would I be correct in saying ES6 has even nicer syntax for these kind of operations, like the spread operator '...array'