Add OSError.__reduce__ #4191
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Add OSError.__reduce__ #4191
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dvermd
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youknowone
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vm/src/exceptions.rs
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| // second exception filename | ||
| "filename2" => ctx.none(), | ||
| "__str__" => ctx.new_method("__str__", excs.os_error, os_error_str), | ||
| "__reduce__" => ctx.new_method("__str__", excs.os_error, os_error_reduce), |
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| "__reduce__" => ctx.new_method("__str__", excs.os_error, os_error_reduce), | |
| "__reduce__" => ctx.new_method("__reduce__", excs.os_error, os_error_reduce), |
vm/src/exceptions.rs
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| if new_args.args.len() >= 2 { | ||
| new_args.args.truncate(2); | ||
| } |
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This is a question because I don't know the spec very well. Exceptions usually takes infinite args and store it. What happens for more args than 4 in this case?
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It seems to work that no matter how we put arguments to its parenthesis (work means it does not throw exceptions).
But according to code and behavior. it works as expected when only the given argument length is between 2 and 5.
>>> OSError(1,2).errno
1
>>> OSError(1,2).strerror
2
>>> OSError(1)
OSError(1)
>>> OSError(1).errnohttps://github.com/python/cpython/blob/3.10/Objects/exceptions.c#L820-L876
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Tested by removing expected failure and commenting everything but OSError in Lib/test/test_exceptions.py::testAttributes::exceptionList, WindowsError of the test.
Part of #3611