Python Tutorial: Itertools Module - Iterator Functions for Efficient Looping

In this Python Programming Tutorial, we will be learning about the itertools module. The itertools module is a collection of functions that allows us to work with iterators in an efficient way. Depending on your problem, this can save you a lot of memory and also a lot of work. Let's get started...

Functions Covered in This Video:
count - 1:19
zip_longest - 6:48
cycle - 9:17
repeat - 11:09
starmap - 14:06
combinations - 15:34
permutations - 15:34
product - 19:45
chain - 21:40
islice - 23:37
compress - 28:50
filterfalse - 31:49
dropwhile - 32:24
takewhile - 32:24
accumulate - 34:54
groupby - 37:04
tee - 43:28

The code from this video can be found at:

Iterators Tutorial:

Sorting Tutorial:

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[wolfisraging]

U r seriously a world class teacher
Thanks man

[medi]

Best python on youtube, and even away better than paid courses, thanks man.

[Lu_Ca]

best itertools tutorial, should be in the official page imo

[programmer]

Incredible video ! I love is when he says : 'If you don't know smth' and then explains it, as I am used to getting a link to another video or no explanation at all. I learned so many things !

[karanagarwal]

The first thing to do after getting a job: Become a Patreon for this channel

[festivalofcolorsholinyc]

tee is like a T is a pipe (like with fluid in it). It's an analogy with unix piping.
On *nix you can:
Command1 | tee file.txt | command2
And it will pipe the output of command1 to tee which will write it to the file 'file.txt' and in turn pipe it to command2.

[VikasGuptacherie]

One thing that I like about this channel is the right pace in which video moves...

[ibekwevictor]

The best youtube teacher you can ever think of... Thanks for the Tutorial sir...

[greob]

Nice and clear demonstration, as always. Thanks!
44:41 yep, sounds like it comes from the Linux tee program. It comes from the fact that it splits the output into two, like a T shaped pipe.

[JassimBjj]

Hey, Corey, I'm a python beginner and I've started watching your python tutorials a few days ago. And I just wanted to tell you that you're a great teacher. I wish that I had found out about you 3 months ago when I started. I'm a Treehouse student, I like it there but they don't really explain as well as you do. So thank you, Corey, I appreciate your great work.

[sumaryze]

Hands down the best education video on python itertools

[josephomondi]

man, I dont' even know how to thank you enough....this is such a good tutorial.

[Pheshen]

I'm learning and using courses and tutorials almost all my life. And I can say with certainty - Corey is brilliant at teaching!

[marcd]

This is probably the best itertools instructional on video... What a useful module! Very good job!

[prakharprakashverma]

I've seen python videos of many tutors on Youtube but Corey and Navin (from the Telusko channel) are my favorites. Both are amazing teachers ❤❤

[vitalikq]

Thanks for the helpful video. English is a foreign language for me, but you speak and explain very clearly.

[lowyieldbondfunds]

One of the most concise lessons about itertools in Python. Thanks Corey!

[ritzg]

This is the best description/explanation of itertools that I have seen.

Thank you so much for this video.

[swarupsarangi]

This Guy is the best Python Teacher ever. I learnt Python from his Videos. I hope you r fine since I don't see any latest videos.

[MinkoTerziyski]

I don't know, why you sharing all this knowledge, but I am extremely, extremely thankful!