The docs for PyRun_String say that both globals and locals should be
dictionaries [1].
However, digging into the source [2] shows me that locals doesn’t need to be a
dictionary;
it just needs to implement the mapping protocol. Is it a bad idea to rely on
this fact?
(Context: I’m plugging a custom object into locals that uses __getitem__ to
track lookups.)
Thanks,
Matt
[1] https://docs.python.org/3.4/c-api/veryhigh.html#c.PyRun_StringFlags
[2]
https://github.com/python/cpython/blob/master/Objects/frameobject.c#L628-L629
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