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#
# nested.py
# Copyright, 2007 - Paul McGuire
#
# Simple example of using nested_expr to define expressions using
# paired delimiters for grouping lists and sublists
#
from pyparsing import *
data = """
{
{ item1 "item with } in it" }
{
{item2a item2b }
{item3}
}
}
"""
# use {}'s for nested lists
nestedItems = nested_expr("{", "}")
print((nestedItems + string_end).parse_string(data).as_list())
# use default delimiters of ()'s
mathExpr = nested_expr()
print(mathExpr.parse_string("((( ax + by)*C) *(Z | (E^F) & D))"))
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