5 Useful Generator Functions In Python

In this video I’m going to be showing you five useful generator functions that will help you learn how generators work in more detail.

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00:00 Learning Python made simple
00:05 Intro
00:15 Fibonacci
04:20 Reading lines
07:47 Cumulative sum
12:27 Infinite repeater
14:42 Row reader
17:54 Conclusion

[thomaseb]

if you don't finish the read or csv_row_reader generators, that file is open for the entire duration of the program
the with block should be outside the function

[bincharinnovik]

This is great explanation and best for me to start learning Python, Thank you very much for demo.

[luketurner]

3:04 `i` could be replaced with `_` since the value of `i` is never used (line 18):

for _ in range(n):

[liamrwilkins]

I've never understood generators in JavaScript, (or any language), but this explained it so well!
I have so many ideas for where to use these in my projects! (I love that learning about one language can teach you about others as well 😊)

[akcelero]

hey hey, great material, keep that up!
just wanted to share with you guys other useful thing about generators:
`yield from`
unfortunately I can't past link here to docs
but anyway - it would simplify iterations in examples : )

[oli]

Really nice explanation! Very understandable. Maybe it would help even more if you showe the result first, then went into "how to code it"

[Slangs]

Can we get a sequel for Bob's story? I am intrigued, it sounds wise

[hamidraza]

Great video, love from Lahore Pakistan

[EUJokerBR]

This was helpful. But creating generators using classes is way harder I think, you have to set some methods and sometimes the output is the memory address instead of the value you want. Pain

[olivierbouchez]

is there a difference for exemple 4. if we do yield from sequence, instead the for item in sequence: yield item

[AlexandrShadchin]

typing.Generator is deprecated alias to collections.abc.Generator.

[samuelec]

Try to keep more code in the viewport so not just the function but also what called it

[ahmoin]

8:10 lol numpy calls cumulative sum that too

[largewallofbeans]

So… the line reading one is just map(str.strip, open(…))?

[syrupthesaiyanturtle]

what's the difference between a generator, an iterator, and an iterable?

[soycrates]

pretty sure iterating over the lines of a file object ensures only one line is read into memory at a time, so not sure the reader generator is actually necessary.

[syrupthesaiyanturtle]

so yield can send out and receive values?? maybe it should be named into something else...

[mpty]

thats opposite of what python was developed for

[noli-timere-crede-tantum]

How is the fibonacci function useful? Who actually uses it except for someone interviewing a junior dev or someone developing a scrum board app (in which case you only need the first 7 values)