def get_country_by_id(self, country_id) -> '<STR_LIT>':
VALID_POSITIVE_INT.validate(country_id, '<STR_LIT>', exc=ValueError)<EOL>if country_id not in self._countries_by_id.keys():<EOL><INDENT>for country in self.countries:<EOL><INDENT>if country.country_id == country_id:<EOL><INDENT>return country<EOL><DEDENT><DEDENT>raise ValueError(country_id)<EOL><DEDENT>else:<EOL><INDENT>return self._countries_by_id[country_id]<EOL><DEDENT>
Gets a country in this coalition by its ID

Args:
    country_id: country Id

Returns: Country