Two aces up Python's sleeve
Annada Behera
annada at tilde.green
Thu Nov 7 02:25:53 EST 2024
>Then please explain why I have to write:
>
> i += 1
>
>Instead of the shorter:
>
> i ++
>
>My short-term memory is really stressed.
I heard this behavior is because python's integers are immutable.
For example:
>>> x,y = 5,5
>>> id(x) == id(y)
True
5 is a object that x and y points to. ++x or x++ will redefine 5 to
6, which the interpreter forbids to keep it's state mathematically
consistent. Also, by not supporting x++ and ++x, it avoids the pre-
and post-increment (substitute-increment v. increment-substitute) bugs
that plagues C and it's children.
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