from typing import Dict, List, Tuple
[docs]class MultiLingualString(str):
# two characters language code: en, th, de, fr, etc.
lang: str
lang2value: Dict[str, str]
def __new__(cls, lang2value: Dict[str, str], lang):
object = str.__new__(cls, lang2value[lang])
object.lang = lang
object.lang2value = lang2value
return object
[docs] def as_lang(self, lang: str) -> str:
return self.lang2value[lang]
[docs] def as_lang_default(self, lang: str, default: str) -> str:
return self.lang2value.get(lang, default)
[docs] def has_lang(self, lang: str) -> bool:
return lang in self.lang2value
[docs] @staticmethod
def en(label: str):
return MultiLingualString(lang2value={"en": label}, lang="en")
[docs] def to_dict(self):
return {"lang2value": self.lang2value, "lang": self.lang}
[docs] def to_tuple(self):
return self.lang2value, self.lang
def __getnewargs__(self) -> Tuple[Dict[str, str], str]:
return self.lang2value, self.lang
[docs]class MultiLingualStringList(List[str]):
def __init__(self, lang2values: Dict[str, List[str]], lang):
super().__init__(lang2values[lang])
self.lang2values = lang2values
self.lang = lang
[docs] def to_dict(self):
return {"lang2values": self.lang2values, "lang": self.lang}
[docs] def to_tuple(self):
return self.lang2values, self.lang