[Python-ideas] Built-in parsing library

[Nam Nguyen]

On Sun, Mar 31, 2019 at 12:13 PM David Mertz <mertz at gnosis.cx> wrote:

> I just found this nice summary. It's not complete, but it looks well
> written. https://tomassetti.me/parsing-in-python/
>
> On Sun, Mar 31, 2019, 3:09 PM David Mertz <mertz at gnosis.cx> wrote:
>
>> There are about a half dozen widely used parsing libraries for Python.
>> Each one of them takes a dramatically different approach to the defining a
>> grammar. Each one has been debugged for over a decade.
>>
>> While I can imagine proposing one for inclusion in the standard library,
>> you'd have to choose one (or write a new one) and explain why that one is
>> better for everyone (or at least a better starting point) than all the
>> others are.
>>
>
I'm not at that stage, yet. By the way, it still is not clear to me if you
think having one in the stdlib is desirable.


> You're also have to explain why it needs to be in the standard library
>> rather than installed by 'pip install someparser'.
>>
>
Installing a package out of stdlib does not solve the problem that
motivated this thread. The libraries included in the stdlib can't use those
parsers.

Cheers,
Nam


>
>> On Sat, Mar 30, 2019, 1:58 PM Nam Nguyen <bitsink at gmail.com> wrote:
>>
>>> Hello list,
>>>
>>> What do you think of a universal parsing library in the stdlib mainly
>>> for use by other libraries in the stdlib?
>>>
>>> Through out the years we have had many issues with protocol parsing.
>>> Some have even introduced security bugs. The main cause of these issues is
>>> the use of simple regular expressions.
>>>
>>> Having a universal parsing library in the stdlib would help cut down
>>> these issues. Such a library should be minimal yet encompassing, and whole
>>> parse trees should be entirely expressible in code. I am thinking of
>>> combinatoric parsing as the main candidate that fits this bill.
>>>
>>> What do you say?
>>>
>>> Thanks!
>>> Nam
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>>
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