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IronLanguages / ironpython2

Implementation of the Python programming language for .NET Framework; built on top of the Dynamic Language Runtime (DLR).
http://ironpython.net
Apache License 2.0
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None: C# vs Ironpython #685

Open xsfhlzh opened 4 years ago

xsfhlzh commented 4 years ago

I am writing a program which is similar to ironstubs to introduce C# types into ironpython. This helps me write code well in vscode. Some issues have arisen. In Enum, for example, some C# programs often use None as one of them. I use python3.8 as the engine in the python extension of vscode. The extension considers None to be a keyword, so the following code is wrong: class ModeIdentifier (System.Enum):      value__ = None #type: int      None = None #type: int      Move = None #type: int      CustomStart = None #type: int I wonder if I can change None to _None in ironpython, or something else so that I won't get an error in the IDE.

slozier commented 4 years ago

Unfortunately, as far as I know, the Python language does not provide a mechanism to escape keywords.

We ran into a similar issue when changing None to a keyword in the IronPython 3 codebase. The recommended workaround is to not use .None, but getattr instead. For example, StringSplitOptions.None is invalid syntax, but StringSplitOptionsNone = getattr(StringSplitOptions, "None") works.

xsfhlzh commented 4 years ago

Thanks slozier! I hope Ironpython makes some changes. Since keywords are not supported as field names, changing them to friendly names is an option. For example: _None = None