[Numpy-discussion] A small challenge

Charles R Harris charlesr.harris at gmail.com
Sat Dec 29 09:57:22 EST 2012

On Sat, Dec 29, 2012 at 4:14 AM, Nathaniel Smith <njs at pobox.com> wrote:

> On Sat, Dec 29, 2012 at 7:07 AM, Charles R Harris
> <charlesr.harris at gmail.com> wrote:
> > Hi All,
> >
> > I propose a challenge: express the dtype grammar in EBNF. That's all.
> Not sure I understand. Do you mean just the little string-parsing DSL
> for specifying dtypes ("i4,datetime64[ms]"), or is there some way to
> write EBNF for describing arbitrary nested Python structures?
Heh, pinning that down is part of the problem. I think a good start is the
string parsing, but dtypes can also be constructed using python tuples,
lists and types.

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