PPeg
PPeg is a pattern matching library for Python, based on Parsing Expression Grammars (PEGs). It’s a port of the LPeg library from Lua.
Usage
Unlike the re module [1], PPeg patterns can handle balanced sequences
>>> from _ppeg import Pattern as P
>>> pattern = P.Grammar('(' + ( (P(1)-P.Set('()')) | P.Var(0) )**0 + ')')
>>> pattern('(foo(bar()baz))').pos
15
>>> pattern('(foo(bar(baz)').pos
-1
>>> capture = P.Cap(pattern)
>>> capture('(foo(bar()baz))').captures
['(foo(bar()baz))']This example corresponds roughly to the following LPeg example
> lpeg = require "lpeg"
> pattern = lpeg.P{ "(" * ((1 - lpeg.S"()") + lpeg.V(1))^0 * ")" }
> pattern:match("(foo(bar()baz))") -- Lua indexes begin at 1
16
> pattern:match("(foo(bar(baz)")
nil
> capture = lpeg.C(pattern)
> capture:match("(foo(bar()baz))")
"(foo(bar()baz))"Modules
_cpeg.c
- _ppeg.c
includes lpeg.c
1 maintainer
Metadata
1 maintainer
Release files for PPeg 0.9.4
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| PPeg-0.9.4.tar.gz | 46.6 kB | Without provenance | Details for PPeg-0.9.4.tar.gz |
Release files / PPeg-0.9.4.tar.gz
| Download URL | PPeg-0.9.4.tar.gz |
|---|---|
| Size | 46.6 kB |
| Tags | Source |
|
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Security for PPeg 0.9.4
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