parsy_iso8601_date_parser_with_generate_syntax.py

1from parsy import string, regex, generate
2
3# A parser for 4 digits
4year = regex(r'[0-9]{4}').map(int)
5
6# A parser for 2 digits
7month = regex(r'[0-9]{2}').map(int)
8day = regex(r'[0-9]{2}').map(int)
9
10# A parser for a dash
11dash = string("-")
12
13# Use 'generate' to combine parsers using generator syntax
14@generate
15def date():
16    y = yield year
17    yield dash
18    m = yield month
19    yield dash
20    d = yield day
21    return [y, m, d]
22
23# Use the parser
24result = date.parse("2017-09-02")
25print(result)  # Output: [2017, 9, 2]