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Timeline for What does the "yield" keyword do in Python?

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Jun 18, 2024 at 23:30 comment added user129393192 @JacobWard on my python implementation, it works even when you do return <value>
May 17, 2024 at 5:08 comment added Zhou Haibo ``` @pytest.fixture(autouse=True) def setup_page_scenarios(home_page: ProgramHomePage) -> Iterator[None]: home_page.restart_app() yield ``` This function is called automatically(autouse=True), but the code inside it runs which again “When you call a function that contains a yield statement anywhere, you get a generator object, but no code runs. ”, could anyone explain about this?
Mar 24, 2024 at 4:17 history edited Mateen Ulhaq CC BY-SA 4.0
Add documentation links.
Aug 10, 2023 at 4:26 history edited Michael M. CC BY-SA 4.0
minor grammatical/formatting changes for clarification and correctness
May 18, 2023 at 20:39 review Suggested edits
May 19, 2023 at 21:42
S Oct 1, 2022 at 18:08 history suggested Saket Thakur CC BY-SA 4.0
fixed grammar
Oct 1, 2022 at 9:44 review Suggested edits
S Oct 1, 2022 at 18:08
Sep 5, 2022 at 9:12 comment added Karl Knechtel Interestingly, at least two different people used the Bank example from this answer... to ask duplicate questions about the meaning/necessity of self.
Aug 15, 2022 at 11:35 comment added Parisa Khateri Where yield is defined: >>> def create_generator(): ... mylist = range(3) should be: >>> def create_generator(): ... mylist = (x*x for x in range(3)) instead.
Dec 29, 2021 at 16:10 comment added chepner @Zaffer Basically. Each call to the function creates a new generator object based on the generator function which can be iterated over independently. I sometimes wish there was a separate keyword like codef to define such functions, so that yield in a def would be a syntax error. (It used to be a syntax error to use both return and yield in the same function, but then return was allowed as a shortcut for raising StopIteration.)
Jul 17, 2021 at 16:40 comment added Zaffer So yield anywhere in a function makes the function a generator, which is basically an iterable of yields from a function?
Mar 7, 2021 at 12:59 history edited Georg Plaz CC BY-SA 4.0
function names should be snake case https://www.python.org/dev/peps/pep-0008/#:~:text=Use%20the%20function%20naming%20rules,invoke%20Python's%20name%20mangling%20rules.
S Jan 27, 2021 at 17:28 history suggested jakubde CC BY-SA 4.0
Replaced dead link with a wayback machine variant
Jan 27, 2021 at 13:09 review Suggested edits
S Jan 27, 2021 at 17:28
Dec 3, 2020 at 1:23 comment added Jacob Ward The yield statement suspends function’s execution and sends a value back to the caller, but retains enough state to enable function to resume where it is left off. When resumed, the function continues execution immediately after the last yield run. This allows its code to produce a series of values over time, rather than computing them at once and sending them back like a list.
Sep 26, 2020 at 19:06 review Suggested edits
Sep 26, 2020 at 20:19
Jun 6, 2020 at 6:03 comment added alani @MatthiasFripp "This continues until the function runs off the end" -- or it encounters a return statement. (return is permitted in a function containing yield, provided that it does not specify a return value.)
May 7, 2020 at 10:12 comment added WoJ It would be nice to add to this great answer why It is just the same except you used () instead of [], specifically what () is (there may be confusion with a tuple).
S Mar 5, 2020 at 0:39 history edited Błażej Michalik CC BY-SA 4.0
reworded for clarity (distinguish between running a loop and running an iteration of a loop)
S Mar 5, 2020 at 0:39 history suggested Alan CC BY-SA 4.0
reworded for clarity (distinguish between running a loop and running an iteration of a loop)
Mar 4, 2020 at 21:40 review Suggested edits
S Mar 5, 2020 at 0:39
Dec 29, 2019 at 11:09 history bounty awarded U13-Forward
Nov 13, 2019 at 9:59 review Suggested edits
Nov 13, 2019 at 10:11
Sep 23, 2019 at 8:06 review Suggested edits
Sep 23, 2019 at 10:16
S Sep 1, 2019 at 8:21 history suggested shaik moeed CC BY-SA 4.0
Improved formatting and corrected grammar
Sep 1, 2019 at 7:03 review Suggested edits
S Sep 1, 2019 at 8:21
Aug 15, 2019 at 12:17 review Suggested edits
Aug 15, 2019 at 14:44
May 2, 2019 at 19:34 history edited Alec CC BY-SA 4.0
added 35 characters in body
Apr 12, 2019 at 6:12 review Suggested edits
Apr 12, 2019 at 7:38
Dec 29, 2018 at 7:21 review Suggested edits
Dec 29, 2018 at 10:55
S Dec 3, 2018 at 5:57 history suggested Srikanth Gopalakrishnan CC BY-SA 4.0
Corrected a logical flaw
Dec 3, 2018 at 5:38 review Suggested edits
S Dec 3, 2018 at 5:57
May 20, 2018 at 9:49 history edited Peter Mortensen CC BY-SA 4.0
Active reading [<https://en.wikipedia.org/wiki/One-liner_program>]
S Mar 12, 2018 at 0:42 history suggested Invariance CC BY-SA 3.0
Fixed grammar
Mar 11, 2018 at 23:20 review Suggested edits
S Mar 12, 2018 at 0:42
Feb 15, 2018 at 19:21 comment added picmate 涅 "These iterables are handy... but you store all the values in memory and this is not always what you want", is either wrong or confusing. An iterable returns an iterator upon calling the iter() on the iterable, and an iterator doesn't always have to store its values in memory, depending on the implementation of the iter method, it can also generate values in the sequence on demand.
S Nov 29, 2017 at 9:06 history suggested Deepak Sood CC BY-SA 3.0
added python3 support for attribute __next__() in generator or next(generator_val)
Nov 29, 2017 at 7:46 review Suggested edits
S Nov 29, 2017 at 9:06
Oct 25, 2017 at 20:52 history edited user2357112 CC BY-SA 3.0
added 3 characters in body
S Aug 6, 2017 at 22:31 history edited tom CC BY-SA 3.0
Remove enclosing class introduced by previous edit to match the code in the question.
S Aug 6, 2017 at 22:31 history suggested Cory Madden CC BY-SA 3.0
example included invalid Python that would not compile. You can't have a "." in a function name
Aug 6, 2017 at 14:19 review Suggested edits
S Aug 6, 2017 at 22:31
Aug 6, 2017 at 3:36 review Suggested edits
Aug 6, 2017 at 6:11
May 23, 2017 at 21:41 comment added Matthias Fripp yield is not as magical this answer suggests. When you call a function that contains a yield statement anywhere, you get a generator object, but no code runs. Then each time you extract an object from the generator, Python executes code in the function until it comes to a yield statement, then pauses and delivers the object. When you extract another object, Python resumes just after the yield and continues until it reaches another yield (often the same one, but one iteration later). This continues until the function runs off the end, at which point the generator is deemed exhausted.
Apr 15, 2017 at 22:55 history edited codeforester CC BY-SA 3.0
edited body
Oct 16, 2016 at 13:29 review Suggested edits
Oct 16, 2016 at 14:49
S Sep 23, 2016 at 9:08 history suggested Umair Ahmad CC BY-SA 3.0
just "an" correction
Sep 23, 2016 at 7:26 review Suggested edits
S Sep 23, 2016 at 9:08
Aug 1, 2016 at 19:11 history edited gsamaras CC BY-SA 3.0
minor
Mar 2, 2016 at 16:04 history edited orokusaki CC BY-SA 3.0
Minor punctuation correction
Jan 5, 2016 at 6:29 review Suggested edits
Jan 5, 2016 at 7:32
S Dec 22, 2015 at 14:58 history suggested J. A. Corbal CC BY-SA 3.0
Excellent post. Just minimal grammar correction (*can not -> cannot)
Dec 22, 2015 at 14:21 review Suggested edits
S Dec 22, 2015 at 14:58
Oct 29, 2015 at 14:56 history edited rmtheis CC BY-SA 3.0
fixed grammar
Jul 15, 2015 at 17:34 history bounty awarded rassa45
Jul 14, 2015 at 21:23 history rollback Aaron Hall♦
Rollback to Revision 26
Jun 30, 2015 at 11:45 history edited Eric O. Lebigot CC BY-SA 3.0
Fixed incorrect statement (iterators cannot be iterated over many times), and qualified restrictive statement about iterators (they do not have to be built from an iterable).
S Jun 18, 2015 at 13:37 history suggested Waqar CC BY-SA 3.0
improve formatting
Jun 18, 2015 at 12:28 review Suggested edits
S Jun 18, 2015 at 13:37
Apr 17, 2015 at 19:28 history edited Kasravnd CC BY-SA 3.0
added 6 characters in body
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Aug 22, 2014 at 10:22 history edited Alireza Fallah CC BY-SA 3.0
[Edit removed during grace period]
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Apr 22, 2014 at 14:26 history edited unode CC BY-SA 3.0
minor code indentation correction
Oct 19, 2013 at 21:25 history bounty awarded alecxe
S Oct 8, 2013 at 4:58 history suggested Bleeding Fingers CC BY-SA 3.0
irrelevant links removed
Oct 8, 2013 at 4:52 review Suggested edits
S Oct 8, 2013 at 4:58
Jul 20, 2013 at 18:35 history edited martineau CC BY-SA 3.0
Clarified what happens the first time the generator created from a function with yield is used.
S May 15, 2013 at 22:03 history suggested twasbrillig CC BY-SA 3.0
minor grammar fixes
May 15, 2013 at 21:59 review Suggested edits
S May 15, 2013 at 22:03
Apr 13, 2013 at 7:53 history edited TimB CC BY-SA 3.0
Tiny wording clarification.
S Apr 10, 2013 at 4:30 history suggested Kylar CC BY-SA 3.0
Correct terminology. The Python documentation states: When a generator function is called, it returns an iterator known as a generator iterator, or more commonly, a generator.
Apr 10, 2013 at 4:27 review Suggested edits
S Apr 10, 2013 at 4:30
S Mar 30, 2013 at 7:07 history suggested Michael Geary CC BY-SA 3.0
Change "comprehension list" to "list comprehension"
Mar 30, 2013 at 6:52 review Suggested edits
S Mar 30, 2013 at 7:07
Jan 28, 2013 at 12:33 history edited Marius Gedminas CC BY-SA 3.0
corrected punctuation (spaces before a colon)
Oct 29, 2012 at 17:44 history wiki removed Robert Harvey
Oct 24, 2012 at 15:43 history edited Dolph CC BY-SA 3.0
moved intro statement to outside of the first section
May 23, 2012 at 5:30 history edited machineghost CC BY-SA 3.0
shortened code comments slightly to eliminate horizontal scrolling
S Apr 28, 2012 at 5:57 history suggested Gabriel Gaster CC BY-SA 3.0
Corrected typo. Changed the word "expends" to "expands" in: The loop iterate on a list but the list expands while the loop is been iterated
Apr 28, 2012 at 0:27 review Suggested edits
S Apr 28, 2012 at 5:57
Jul 5, 2011 at 11:34 history edited Bite code CC BY-SA 3.0
deleted 2 characters in body
May 26, 2011 at 6:48 history edited Parand CC BY-SA 3.0
Corrected spelling / grammar (every to ever)
Aug 15, 2010 at 16:19 history edited Zack Marrapese CC BY-SA 2.5
deleted 1 characters in body
Aug 14, 2010 at 16:41 history edited rz. CC BY-SA 2.5
mylist -> mygenerator after the generator example.
Feb 19, 2010 at 13:22 history edited Bite code CC BY-SA 2.5
Removing the dust from this very old post
Nov 10, 2009 at 11:54 history edited Bite code CC BY-SA 2.5
typo
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adding link to decorators
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adding JF comment
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adding part on infinite generators
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answer to comment
Oct 24, 2008 at 2:18 vote accept Alex. S.
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add code analysis
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