On 3/24/2017 11:10 AM, Pavel Velikhov wrote:
Hi folks!
We started a project to extend Python with a full-blown query language
about a year ago. The project is call PythonQL, the links are given
below in the references section. We have implemented what is kind of an
alpha version now, and gained some experience and insights about why and
where this is really useful. So I’d like to share those with you and
gather some opinions whether you think we should try to include these
extensions in the Python core.
No. PythonQL defines a comprehension-inspired SQL-like domain-specific
(specialized) language. Its style of packing programs into expressions
is contrary to that of Python. It appears to me that most of the added
features duplicate ones already in Python (sorted, itertools, named
tuples?). I think it should remain a separate project with its own
development group and schedule.
This is not to say that I would never use PQL. I like he idea of a
uniform method of accessing in-memory and on-disk date, and like
Python's current method of making files an iterable of lines. I believe
the current DB API allows something similar.
I think that the misuse of coding cookies, which makes it unusable in
code that already has a proper coding cookie, should be replaced by
normal imports. PQL expressions should be quoted and passed to the dsl
processor, as done with SQL and other DSLs.
--
Terry Jan Reedy
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