GeezerVison

Add a reference entry for __lazy_import__ and link it from the language reference for lazy imports. Give the table substitution its own comment explaining the column width and the link to the existing function target.

Validation: a fresh HTML build with warnings treated as errors, Sphinx lint 1.0.2 on both PR documentation files, whitespace checks, and rendered table/link checks passed. Rendering the published source with the same dependencies confirmed unchanged table HTML and anchors. Runtime tests were not rerun for this comment-only follow-up.

Public searches for 161708 and __lazy_import__, across open and closed issues and PRs, found no conflicting documentation contribution; #161716 changes the C docstring separately.

Prepared with OpenAI Codex assistance.

• Issue: Document __lazy_import__ #161708

Validation

• git diff --check f34ba9882b2bc06a45513d749b1ce421e74e376c HEAD -- Doc/builtins/functions.rst — exit 0
• /cache/cpython-pr-161762-docs/bin/sphinx-lint --enable=default-role Doc/builtins/functions.rst Doc/reference/simple_stmts.rst — exit 0
• make -C Doc html VENVDIR=/cache/cpython-pr-161762-docs JOBS=4 SPHINXOPTS='--fresh-env --write-all' — exit 0
• python3 - <<'PY' from pathlib import Path root = Path('Doc/build/html') functions = (root / 'builtins/functions.html').read_text(encoding='utf-8') reference = (root / 'reference/simple_stmts.html').read_text(encoding='utf-8') assert 'id="func-lazy-import"' in functions assert 'id="lazy_import__"' in functions assert 'href="#func-lazy-import"' in functions assert '../builtins/functions.html#lazy_import__' in reference PY — exit 0
• GIT_NO_LAZY_FETCH=1 git diff --check f34ba9882b2bc06a45513d749b1ce421e74e376c HEAD -- Doc/builtins/functions.rst — exit 0
• `python3 - <<'PY'
  import html
  from pathlib import Path
  import re

root = Path('Doc/build/html')
functions = (root / 'builtins/functions.html').read_text(encoding='utf-8')
reference = (root / 'reference/simple_stmts.html').read_text(encoding='utf-8')
assert 'id="func-lazy-import"' in functions
assert 'id="lazy_import__"' in functions
assert 'href="#func-lazy-import"' in functions
assert '../builtins/functions.html#lazy_import__' in reference

table = functions.split('<table', 1)[1].split('', 1)[0]
cells = re.findall(r'<td\b.?', table, flags=re.DOTALL)
assert len(cells) == 4
assert 'href="#func-lazy-import"' in cells[3]
last_column = html.unescape(re.sub(r'<[^>]>', '', cells[3]))
assert last_column.index('import()') < last_column.index('lazy_import()')
visible_text = html.unescape(re.sub(r'<[^>]*>', '', functions))
assert 'Use a substitution because' not in visible_text
PY` — exit 0

Prepared with AI assistance (Codex gpt-6.1-sol). Independent automated review passed for source tree 6f874ac7770b773a2de54fa77c721c894db06e2d. This is automated review. Upstream CI is pending until GitHub reports its result.