On 13/01/2017 17:08, Ian Kelly wrote:
On Fri, Jan 13, 2017 at 3:46 AM, Steve D'Aprano
<steve+pyt...@pearwood.info> wrote:
http://aosabook.org/en/500L/a-python-interpreter-written-in-python.html
Neat. But not really surprising IMO that it can fit into 500 lines,
If there are still 120 or so byte-codes, then that's just 4 lines on
average to implement each byte-code, which is pretty good going.
Even when it turns out that the actual code on github is 1000 lines
rather than 500! Maybe it grew a bit since the 500 lines was quoted.
But it's still 8 lines per byte-code.
since it doesn't handle compiling Python into bytecode (which is the
hard part)
I disagree that that's the hardest part. But it was probably not very
interesting for this project. Implementing the runtime environment, the
object system, type-dispatchers, error-handling, symbol tables, garbage
collection and all the rest would be more challenging.
and doesn't include libraries. There doesn't seem to be
much purpose to this other than it being a toy project written for a
book.
Being educational would be enough of a point.
--
Bartc
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