def test_tag(self):
parser = letter.many().concat().tag("word")
self.assertEqual(parser.sep_by(string(",")).parse("this,is,a,list"),
[("word", "this"),
("word", "is"),
("word", "a"),
("word", "list")])
def test_many(self):
letters = letter.many()
self.assertEqual(letters.parse('x'), ['x'])
self.assertEqual(letters.parse('xyz'), ['x', 'y', 'z'])
self.assertEqual(letters.parse(''), [])
self.assertRaises(ParseError, letters.parse, '1')
def test_tag_map_dict(self):
parser = seq(letter.tag("first_letter"),
letter.many().concat().tag("remainder")).map(dict)
self.assertEqual(parser.parse("Hello"), {
'first_letter': 'H',
'remainder': 'ello'
})
def test_many(self):
letters = letter.many()
self.assertEqual(letters.parse('x'), ['x'])
self.assertEqual(letters.parse('xyz'), ['x', 'y', 'z'])
self.assertEqual(letters.parse(''), [])
self.assertRaises(ParseError, letters.parse, '1')
def test_mark(self):
parser = (letter.many().mark() << string("\n")).many()
lines = parser.parse("asdf\nqwer\n")
self.assertEqual(len(lines), 2)
(start, letters, end) = lines[0]
self.assertEqual(start, (0, 0))
self.assertEqual(letters, ['a', 's', 'd', 'f'])
self.assertEqual(end, (0, 4))
(start, letters, end) = lines[1]
self.assertEqual(start, (1, 0))
self.assertEqual(letters, ['q', 'w', 'e', 'r'])
self.assertEqual(end, (1, 4))
def test_mark(self):
parser = (letter.many().mark() << string("\n")).many()
lines = parser.parse("asdf\nqwer\n")
self.assertEqual(len(lines), 2)
(start, letters, end) = lines[0]
self.assertEqual(start, (0, 0))
self.assertEqual(letters, ['a', 's', 'd', 'f'])
self.assertEqual(end, (0, 4))
(start, letters, end) = lines[1]
self.assertEqual(start, (1, 0))
self.assertEqual(letters, ['q', 'w', 'e', 'r'])
self.assertEqual(end, (1, 4))
def test_concat(self):
parser = letter.many().concat()
self.assertEqual(parser.parse(''), '')
self.assertEqual(parser.parse('abc'), 'abc')
from parsy import string, letter, seq, decimal_digit
bag_name = letter.many().concat() + string(' ') + letter.many().concat()
child_bag = seq(
decimal_digit.map(int) << string(' '), bag_name <<
(string(' bags') | string(' bag'))).map(tuple)
child_bag_separator = string(', ') | string('.')
child_bags = string('no other bags.').result(
set()) | (child_bag << child_bag_separator).many().map(set)
bag_rule = seq(bag_name << string(' bags contain '), child_bags).map(tuple)
bag_rules = (bag_rule << string('\n')).many().map(dict)
def get_children_only(child_set):
return {child for amount, child in child_set}
def get_parent_bags(input_children, par_child_dict):
return {
parent
for parent, children in par_child_dict.items()
if any((child in get_children_only(children)
for child in input_children))
}
def get_all_parent_bags(input_children, par_child_dict):
new_bags = input_children.copy()
all_bags = input_children.copy()