Rename _CursesWindow to window #5180
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The name _CursesWindow is not exposed at runtime which makes explicit type annotation difficult. It has to be wrapped in quotes, and this doesn't seem to work for all type checkers: PyLance's typechecker accepts it but Jedi's doesn't (tested in VS Code). This is especially annoying because with curses.wrapper(callback) there is no way to infer the type of the passed window except with an explicit annotation. Experimentally, the type is exposed under the name "_curses.window" in Python 3.9 on both Ubuntu and Windows (via [windows-curses](https://pypi.org/project/windows-curses/)). While this is not explicitly documented as public, it is the name used for all the window method docs, and it is probably unlikely to change since some might interpret the lack of underscore as indicating it is public. Unfortunately it doesn't seem to be exposed as such in Python 2, but `¯\_(ツ)_/¯`. Using the runtime name should allow type checking to work with most typecheckers/platforms without quotes, and the old name can be kept as an alias for backwards compatibility.
I discovered the name _curses.window is only actually exported in Python >= 3.8 so I moved the name behind a version check, and reverted the original class name to _CursesWindow
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Turns out the name _curses.window is only exposed in >= 3.8, so I put the new name behind a version test and reverted to the old name everywhere else. |
Akuli
requested changes
Apr 5, 2021
Co-authored-by: Akuli <akuviljanen17@gmail.com>
Akuli
approved these changes
Apr 5, 2021
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The name
_CursesWindowis not exposed at runtime which makes explicit type annotation difficult. It has to be wrapped in quotes, and this doesn't seem to work for all type checkers: PyLance's typechecker accepts it but Jedi's doesn't (tested in VS Code). This is especially annoying because withcurses.wrapper(callback)there is no way to infer the type of the passed window except with an explicit annotation.Experimentally, the type is exposed under the name
_curses.windowin Python 3.9 on both Ubuntu and Windows (via windows-curses). While this is not explicitly documented as public, it is the name used for all the method docs, and it is probably unlikely to change since some might interpret the lack of underscore as indicating it is public. Unfortunately it doesn't seem to be exposed as such in Python 2, but¯\_(ツ)_/¯. Using the runtime name should allow type checking to work with most typecheckers/platforms without quotes, and the old name can be kept as an alias for backwards compatibility.