RPLY¶ Welcome to RPLY! A pure Python parser generator, that also works with RPython. It is a more-or-less direct port of David Beazley’s awesome PLY, with a new public API, and RPython support. To start using RPly head over to Generating Lexers to learn how to generate lexers, and Generating Parsers after that to see how you can turn the tokens generated by your lexer into something more useful. A
from rply import ParserGenerator, LexerGenerator from rply.token import BaseBox lg = LexerGenerator() # Add takes a rule name, and a regular expression that defines the rule. lg.add("PLUS", r"\+") lg.add("MINUS", r"-") lg.add("NUMBER", r"\d+") lg.ignore(r"\s+") # This is a list of the token names. precedence is an optional list of # tuples which specifies order of operation for avoiding ambiguity.
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