[methane]

• Restore the missing comma in Hello, World so the output matches the input string.
• Clarify that _align_ specifies a minimum alignment; the previous wording incorrectly described it as a maximum.
• Use pointer indexing in the locking example: assigning an integer to .contents raises TypeError, while indexing updates the shared memory.
• Show bytes representations in the linked-list example to match Python 3 output.
• Align the frozen-module explanation with the _PyImport_FrozenBootstrap table used by the example, and update the structure definition and package detection to use is_package.
• Correct the c_char_p argument conversion description: it accepts bytes and does not implicitly encode str.
• Replace the unused type code 'L' with 'q'; 'L' is used by c_ulong.
• Remove the unfinished sentence fragment “These are the”.
• Fix the anonymous-union example by forward-declaring TYPEDESC and assigning pointer instances rather than pointer types.
• Correct bitfield extraction to shift right by bit_offset.
• Document that a c_char_p return value becomes None for a NULL pointer, and remove the obsolete Unicode-return comment.
• Remove sizeof() from the operations that finalize _fields_; querying the size does not prevent subsequent field assignment.

[Copilot]

🟢 Approval recommended

There are no active review issues for the ctypes documentation updates.

No open issues 🎉

What changed in this PR

This documentation-only PR updates the ctypes reference to correct examples and align descriptions with current behavior.

Changes:

• Fix example output, shared-memory pointer assignments, and anonymous-union construction.
• Update frozen-module structure definitions and explanations.
• Clarify alignment, argument and return conversions, type codes, field finalization, and bitfield extraction.

File	Description
Doc/​library/​ctypes.rst	Corrects runnable examples, outdated API descriptions, and documentation errors.

_{Review effort: Balanced}

[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #35636997 | 📁 Comparing 7e8fe2f against main (405f127)

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± library/ctypes.html

[miss-islington-app]

Thanks @methane for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14, 3.15.
🐍🍒⛏🤖

[bedevere-app]

GH-161312 is a backport of this pull request to the 3.15 branch.

[bedevere-app]

GH-161313 is a backport of this pull request to the 3.14 branch.