Скачать или смотреть Python Iterators! COPY or NO COPY?

Which Python builtins make copies of your data and which don't?

Is it better to use reversed, slice a list backwards, or fall back to indices? What about for a numpy array? We take a look at how Python's reversed builtin is able to iterate over your sequence without making a copy of it, and discuss which other builtins make copies and which don't.

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CHAPTERS
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0:00 Intro
0:20 reversed, slice, or indices?
1:27 Implementing reversed
3:32 Copy or no copy?
4:14 Numpy array slicing
5:35 Sometimes you want a copy