integer copy

[Alain Ketterlin]

"ast" <nomail at com.invalid> writes:

> "ast" <nomail at com.invalid> a écrit dans le message de
> news:59e9b419$0$3602$426a74cc at news.free.fr...
>
> Neither works for large integers which is
> even more disturbing
>
> a = 6555443
> b = copy.copy(a)
> a is b
>
> True 

In copy.py:

| [...]
| def _copy_immutable(x):
|     return x
| for t in (type(None), int, long, float, bool, str, tuple,
|           frozenset, type, xrange, types.ClassType,
|           types.BuiltinFunctionType, type(Ellipsis),
|           types.FunctionType, weakref.ref):
|     d[t] = _copy_immutable
| [...]

and d[t] is what decides how to copy, via _copy_dispatch.

So none of the types listed above will be actually copied.

It should be documented more precisely. You should file a
documentation-improvement request.

Also, the doc says:

| This version does not copy types like module, class, function, method,
| nor stack trace, stack frame, nor file, socket, window, nor array, nor
| any similar types.

But who knows what "similar types" are...

-- Alain.