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Mypy throws error using sorted with a key function specified #1160

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timabbott opened this issue Jan 26, 2016 · 2 comments
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Mypy throws error using sorted with a key function specified #1160

timabbott opened this issue Jan 26, 2016 · 2 comments
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bug mypy got something wrong

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@timabbott
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Reproducer: sorted([{'name': 'test'}], key=lambda x: x['name'])

Moved from #1150.
@timabbott timabbott mentioned this issue Jan 26, 2016
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@gvanrossum
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The error is: Value of type object is not indexable. It's about the `x['name'] in the lambda. Almost feels like the type variable leaked or got substituted wrong. Maybe an issue in infer_function_type_arguments()?

@gvanrossum gvanrossum added the bug mypy got something wrong label Jan 26, 2016
@timabbott timabbott mentioned this issue Jan 27, 2016
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@JukkaL JukkaL closed this as completed in a4cc2db Jan 28, 2016
@timabbott
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Confirmed the fix in my application, thanks @JukkaL !

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