[TriLUG] OT-ish: Python array slicing question

[Steve Litt via TriLUG]

Nathan Yinger via TriLUG said on Mon, 12 Dec 2022 12:58:47 -0500

>There is a difference: a[:] creates a copy.
>
>a = [1, 2, 3, 4, 5]
>b = a
>c = a[:]
>a[0] = 7
>print(b) # [7, 2, 3, 4, 5]
>print(c) # [1, 2, 3, 4, 5]
>
>~Nathan

Very, very nice! I've coded Python for 12 years and didn't know that. A
few questions:

Is it a deep copy? In other words, if the array is an array of arrays,
are all the sub-arrays copies too?

Is there a way to do the same thing for dicts?

What's the best way of making a copy of a string?

Thanks to you and the OP for teaching me something valuable.

SteveT

Steve Litt 
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