Message156534
CPython expects __builtins__ to be a dict, but it is interesting to be able to use another type. For example, my pysandbox project (sandbox to secure Python) requires a read-only mapping for __builtins__.
The PEP 416 was rejected, so there is no builtin frozendict type, but it looks like the dictproxy type will be exposed as a public type.
Attached patch uses PyDict_CheckExact() to check if __builtins__ is a dict and add a "slow-path" for other types. The overhead on runtime performance should be very low (near zero), PyDict_CheckExact() just dereference a pointer (to read the object type) and compare two pointers.
The patch depends on issue #14383 patch (identifier.patch) for the __build_class__ identifier. I can write a new patch without this dependency if needed. |
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2012-03-22 01:35:38 | vstinner | set | recipients:
+ vstinner |
2012-03-22 01:35:35 | vstinner | set | messageid: <1332380135.46.0.264363154256.issue14385@psf.upfronthosting.co.za> |
2012-03-22 01:35:33 | vstinner | link | issue14385 messages |
2012-03-22 01:35:32 | vstinner | create | |
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