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bpo-41790: update error in documentation #22242

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4 changes: 2 additions & 2 deletions Doc/c-api/intro.rst
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Expand Up@@ -236,8 +236,8 @@ assignments, scope rules, and argument passing), it is only fitting that they
should be represented by a single C type. Almost all Python objects live on the
heap: you never declare an automatic or static variable of type
:c:type:`PyObject`, only pointer variables of type :c:type:`PyObject*` can be
declared. The sole exception are the type objects; since these must never be
deallocated, they are typically static :c:type:`PyTypeObject` objects.
declared. The sole exception are the type objects; they may be static
:c:type:`PyTypeObject` objects.
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@vstinnervstinnerNov 16, 2020

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"The sole exception are the type objects" looks wrong to me. Almost all types in Python are allocated on the heap.

Only static types are never deallocated.

I'm not sure why these kinds of technical details are giving in an introduction. It would be better to move them to https://docs.python.org/dev/c-api/refcounting.html no?

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@vstinnervstinnerNov 16, 2020

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Or at least, copied there.

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@shihai1991shihai1991Nov 16, 2020

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Hm, I am not find the docs of PyHeapTypeObject. Maybe add those description info in it.

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@erlend-aaslanderlend-aaslandAug 3, 2022

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I'm not certain what to do with this change. The whole paragraph could be revisited, as Victor hints to. I'm not sure if this change makes things clearer for the reader.

@encukou: thoughts?

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@encukouencukouAug 4, 2022

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To be technically correct, it's not just types – PyModuleDef is also a PyObject* (though I assume that's for historical reasons only). But that's too much detail here.

Comment on lines +239 to +240
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@encukouencukouAug 4, 2022

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Would this work?

Suggested change
declared. The sole exception are the type objects; they may be static
:c:type:`PyTypeObject` objects.
declared. (There are a few exceptions, like static type objects, but even those
are usually manipulated via pointers.)


All Python objects (even Python integers) have a :dfn:`type` and a
:dfn:`reference count`. An object's type determines what kind of object it is
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