How do I parse indents and dedents with pyparsing?

Question

Here is a subset of the Python grammar:

single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE

stmt: simple_stmt | compound_stmt
simple_stmt: small_stm         


        

Answer 1

There are a couple of examples on the pyparsing wiki Examples page that could give you some insights:

• pythonGrammarParser.py
• indentedGrammarExample.py

To use pyparsing's indentedBlock, I think you would define suite as:

indentstack = [1]
suite = indentedBlock(stmt, indentstack, True)

Note that indentedGrammarExample.py pre-dates the inclusion of indentedBlock in pyparsing, so does its own implemention of indent parsing.