> Some people, when confronted with a problem, think "I know, I'll use regular expressions." Now they have two problems.
bootpeg is a PEG parser for creating parsers – including itself. By default, it supports a modified EBNF with actions akin to PEP 617.
>>> # recreate the bootpeg parser from itself
>>> from bootpeg import import_parser, actions
>>> from bootpeg.grammars import bpeg
>>> parse_bpeg = bpeg.parse
>>> for _ in range(5):
... parse_bpeg = import_parser(
... bpeg.__name__, dialect=parse_bpeg, actions=actions
... )
>>> print(bpeg.unparse(parse_bpeg))Unlike most other Python PEG parsers, bootpeg is built for one job and one job only: Define how to transform input into a runtime representation. There is no fancy operator overloading, no custom AST formats, no clever PEG extensions, no whitespace special casing, no nothing.
bootpeg supports left-recursive PEG parsing with actions. That's it.
To get started using or contributing to bootpeg, head straight to the bootpeg documentation.
> Some people, when confronted with a problem, think "I know, I'll use self-writing parsers." Now they have problems in problems.
If you need a battle-hardened, production ready parser suite then pyparsing should be your first choice. If you are the choosy type, make it your second choice as well.
Pick bootpeg when you need safe left-recursion and self-parsing. It will never bite off your left peg via infinite recursion. It will take care of itself and all its grammars to make you happy. bootpeg is the friend you need when you know bootpeg is the friend you need.
Well, eventually it will be; bootpeg is still a cute little puppy. Don't let it lift too heavy. So far it is only lifting itself.