[Python-Dev] [compatibility-sig] making sure importlib.machinery.SourceLoader doesn't throw an exception if bytecode is not supported by a VM

[fwierzbicki at gmail.com]

On Tue, Jun 12, 2012 at 9:38 AM, Alex Gaynor <alex.gaynor at gmail.com> wrote:
> For PyPy: I'm not an expert in our import, but from looking at the source
>
> 1) imp.cache_from_source is unimplemented, it's an AttributeError.
Jython does not (yet) have a cache_from_source.

> 2) sys.dont_write_bytecode is always false, we don't respect that flag (we really
>   should IMO, but it's not a high priority for me, or anyone else apparently)
Jython does support sys.dont_write_bytecode, but doesn't support
sys.dont_read_bytecode yet - do you happen to know when
dont_read_bytecode was added? It should be pretty straightforward, and
so I'll probably add it to our 2.7.

-Frank