Use a more precise return type for tokenize.untokenize()

[tomasr8]

No description provided.

[sobolevn]

Hi, @tomasr8! We usually avoid having union return types. See https://github.com/python/typeshed/blob/main/CONTRIBUTING.md#conventions

[Akuli]

We might be able to use the Any trick. If we use str | Any as the return type, it means that you can either assume it's a string (most common use case), or use assert isinstance(result, bytes) or similar if you expect a bytes result.

[tomasr8]

We might be able to use the Any trick. If we use str | Any as the return type, it means that you can either assume it's a string (most common use case), or use assert isinstance(result, bytes) or similar if you expect a bytes result.

This seems like the better option to me, as opposed to leaving it completely untyped

[Akuli]

Let's try the Any trick.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

schemathesis (https://github.com/schemathesis/schemathesis)
-   File "/tmp/mypy_primer/old_mypy/venv/bin/mypy", line 8, in <module>
+   File "/tmp/mypy_primer/new_mypy/venv/bin/mypy", line 8, in <module>
-   File "/tmp/mypy_primer/old_mypy/venv/lib/python3.13/site-packages/mypy/__main__.py", line 15, in console_entry
+   File "/tmp/mypy_primer/new_mypy/venv/lib/python3.13/site-packages/mypy/__main__.py", line 15, in console_entry