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Description
Bug report
Bug description:
I need to implement layered context running python code, so I chooseChainMap. But Python needs everyglobals passed toexec to be adict, so I mixins it intoChainMap.
This patch runs well as far, but in a class it can't get the value from the outside.
I think this may because in the class context CPython uses some function likePyDict_Get instead of__getitem__, so the values didn't get copied into the class's globals context.
This bug caused this code fails:
fromcollectionsimportChainMapclassChainMap(ChainMap,dict):# globals must be a real dictpasssource="""a = 1class A: print(a)"""exec(source,ChainMap())# this line raises NameError
Other reproduction approaches
This is reproduceable inpyodide (a wasm port of CPython 3.12.1), so you can run the code above by just clicking one of the following link:
- Stackblitz - you can edit code and the result will sync instantly
- Python Online - this is faster but just has a console instead of an IDE
CPython versions tested on:
3.12
Operating systems tested on:
Linux, Windows