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Preserve str subclasses in ascii() for ASCII-only __repr__ results #7455

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Merged
youknowone merged 4 commits into from
Mar 19, 2026
Merged

Preserve str subclasses in ascii() for ASCII-only __repr__ results #7455

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043bf3e
Initial plan
Copilot Mar 17, 2026
18fb23e
Preserve str subclasses in ascii
Copilot Mar 17, 2026
6803cee
Fix ruff formatting in builtin_ascii.py snippet
Copilot Mar 17, 2026
77767fc
Delegate builtin_ascii() to PyObject::ascii() to eliminate duplication
Copilot Mar 18, 2026
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Fix ruff formatting in builtin_ascii.py snippet 
Co-authored-by: youknowone <69878+youknowone@users.noreply.github.com>
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Copilot and youknowone committed Mar 17, 2026
commit 6803cee423c0902fff6abd42e3651d445f47df66
4 changes: 4 additions & 0 deletions extra_tests/snippets/builtin_ascii.py
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Expand Up @@ -6,17 +6,21 @@
assert ascii(chr(0x9999)) == "'\\u9999'"
assert ascii(chr(0x0A)) == "'\\n'"


class MyStr(str):
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[auto-format] reported by reviewdog 🐶

Suggested change
class MyStr(str):
class MyStr(str):

pass


class Foo:
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[auto-format] reported by reviewdog 🐶

Suggested change
class Foo:
class Foo:

def __repr__(self):
return MyStr("hello")


class Bar:
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[auto-format] reported by reviewdog 🐶

Suggested change
class Bar:
class Bar:

def __repr__(self):
return MyStr("héllo")


assert type(ascii(Foo())) is MyStr
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[auto-format] reported by reviewdog 🐶

Suggested change
assert type(ascii(Foo())) is MyStr
assert type(ascii(Foo())) is MyStr

assert ascii(Foo()) == MyStr("hello")
assert type(ascii(Bar())) is str
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