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itertools — Functions creating iterators for efficient looping — Python 3.14.7 documentation

itertools — Functions creating iterators for efficient looping — Python 3.14.7 documentation

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2026-07-17 10:00:18
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Public whispers on docs.python.org over the last 17 weeks

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Text Highlight2026-08-11 03:09:57
Original Highlight Excerpt
"List comprehensions provide a concise way to create lists."
Whisper Note
List comprehensions are such a game changer, way cleaner than loops.
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docs.python.org
Text Highlight2026-08-06 03:09:18
Original Highlight Excerpt
"this is the correct code."
Whisper Note
lol that else always trips me up, good catch.
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docs.python.org
Text Highlight2026-07-27 12:40:15
Original Highlight Excerpt
"since it often causes poorly readable code."
Whisper Note
I only use * in the REPL, it's too handy to give up there.
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docs.python.org
Text Highlight2026-07-27 12:31:15
Original Highlight Excerpt
"since it often causes poorly readable code."
Whisper Note
Yeah, wildcard imports make it impossible to know where names come from.
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docs.python.org
Text Highlight2026-07-27 09:37:15
Original Highlight Excerpt
"A module is a file containing Python definitions and statements."
Whisper Note
I always wondered why __name__ showed up in scripts. Now it makes sense.
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docs.python.org
Text Highlight2026-07-27 09:28:15
Original Highlight Excerpt
"A module is a file containing Python definitions and statements."
Whisper Note
Wait, so if I just write some functions in a file, I can import them anywhere? Cool.
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docs.python.org
Text Highlight2026-07-27 09:19:15
Original Highlight Excerpt
"A module is a file containing Python definitions and statements."
Whisper Note
So basically any .py file is a module? That's simpler than I thought.
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docs.python.org
Text Highlight2026-07-26 15:43:07
Original Highlight Excerpt
"Assignments do not copy data — they just bind names to objects."
Whisper Note
So that's why my list changes when I pass it to a function and modify it inside... makes sense now.
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docs.python.org
Text Highlight2026-07-26 12:40:07
Original Highlight Excerpt
"A namespace is a mapping from names to objects."
Whisper Note
Wait, so doesn't that mean functions and variables are just keys? Mind blown.
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docs.python.org
Text Highlight2026-07-26 12:31:07
Original Highlight Excerpt
"A namespace is a mapping from names to objects."
Whisper Note
So basically it's just a fancy word for a dictionary, got it.
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docs.python.org
Text Highlight2026-07-26 09:37:07
Original Highlight Excerpt
"Classes provide a means of bundling data and functionality together."
Whisper Note
Yeah, but the real magic is when you get to override methods and mess with state.
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docs.python.org
Text Highlight2026-07-26 09:28:07
Original Highlight Excerpt
"Classes provide a means of bundling data and functionality together."
Whisper Note
That's the whole point? I thought classes were about inheritance and stuff.
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docs.python.org
Text Highlight2026-07-26 09:19:07
Original Highlight Excerpt
"Classes provide a means of bundling data and functionality together."
Whisper Note
So basically it's just grouping stuff with the functions that use it, neat.
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docs.python.org
Text Highlight2026-07-18 16:10:52
Original Highlight Excerpt
"there are no easy answers"
Whisper Note
Yeah, but knowing that doesn't make debugging floats any less painful.
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docs.python.org
Text Highlight2026-07-18 13:07:52
Original Highlight Excerpt
"0.1 cannot be represented exactly as a base 2 fraction"
Whisper Note
Wait, but my calculator shows 0.1 fine, so why does Python have this problem? Seems like a bug.
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docs.python.org
Text Highlight2026-07-18 12:58:52
Original Highlight Excerpt
"0.1 cannot be represented exactly as a base 2 fraction"
Whisper Note
So that's why 0.1 + 0.2 is never exactly 0.3, it's kind of mind-blowing when you first get it.
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docs.python.org
Text Highlight2026-07-18 10:04:52
Original Highlight Excerpt
"Unfortunately"
Whisper Note
I learned this the hard way when my accounting calc broke.
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docs.python.org
Text Highlight2026-07-18 09:55:52
Original Highlight Excerpt
"Unfortunately"
Whisper Note
But like, does it really matter for most apps though?
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docs.python.org
Text Highlight2026-07-18 09:46:52
Original Highlight Excerpt
"Unfortunately"
Whisper Note
Yeah, 0.1 + 0.2 still hits me every time.
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docs.python.org
Text Highlight2026-07-17 13:21:18
Original Highlight Excerpt
"The following functions all construct and return iterators."
Whisper Note
Yeah, that's the whole point — just make sure you don't forget to break.

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