Backwards emulation rather than backwards compatibility?

[Christopher Browne]

Quoth Tim Churches <tchur at optushome.com.au>:
> I'm not sure how such a meta-interpreter would deal with already
> compiled bytecode - is there a version stamp in the bytecode?

Wouldn't it be easier to simply change the first line to:
#!/usr/bin/python1.5
????
-- 
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