1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
from __future__ import annotations
from string import ascii_letters
from typing import NamedTuple
class UnknownLocaleError(Exception):
pass
class Locale(NamedTuple):
language: str
territory: str = ''
def __str__(self):
if self.territory:
return f'{self.language}_{self.territory}'
return self.language
@classmethod
def parse(cls, identifier, sep):
if not isinstance(identifier, str):
raise TypeError(f"Unexpected value for identifier: '{identifier}'")
locale = cls(*identifier.split(sep, 1))
if not all(x in ascii_letters for x in locale.language):
raise ValueError(f"expected only letters, got '{locale.language}'")
if len(locale.language) != 2:
raise UnknownLocaleError(f"unknown locale '{locale.language}'")
return locale
|
