[docs] frozenset.copy() does not create a copy
songofacandy at gmail.com
Tue May 8 04:28:12 EDT 2018
On Tue, May 8, 2018 at 5:20 PM Mihail Temelkov <mtemelkov at gmail.com> wrote:
> Tried it in Python 2.7 and found that it just creates an alias to the
In Python, copy() or similar methods may return itself for immutable types.
It's widely used optimization.
>>> t1 is t2
And it is implementation (CPython) specific optimization; other
may return new instance.
You shouldn't rely on undocumented behavior.
INADA Naoki <songofacandy at gmail.com>
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