stubdoc: Fix crash on non-str docstring#15623
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Encourted this while testing stubgen on pandas:
```console
$ stubgen -p pandas
Traceback (most recent call last):
File "/tmp/.venv/bin/stubgen", line 8, in <module>
sys.exit(main())
File "mypy/stubgen.py", line 1945, in main
File "mypy/stubgen.py", line 1799, in generate_stubs
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubgenc.py", line 212, in generate_stub_for_c_module
generate_c_type_stub(
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubgenc.py", line 528, in generate_c_type_stub
generate_c_function_stub(
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubgenc.py", line 337, in generate_c_function_stub
inferred = sig_gen.get_method_sig(
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubgenc.py", line 140, in get_method_sig
inferred = self.get_function_sig(cls, module_name, class_name)
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubgenc.py", line 120, in get_function_sig
inferred = infer_sig_from_docstring(docstr, name)
File "/tmp/.venv/lib/python3.10/site-packages/mypy/stubdoc.py", line 264, in infer_sig_from_docstring
tokens = tokenize.tokenize(io.BytesIO(docstr.encode("utf-8")).readline)
AttributeError: 'getset_descriptor' object has no attribute 'encode'
```
This is because of the definition of docstring as a descriptor here
https://github.com/pandas-dev/pandas/blob/main/pandas/_libs/properties.pyx
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|
According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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Encourted this while testing stubgen on pandas:
This is because of the definition of docstring as a descriptor here https://github.com/pandas-dev/pandas/blob/main/pandas/_libs/properties.pyx
(Explain how this PR changes mypy.)