Method fromisoformat

Lib/_pydatetime.py:1040–1055

Construct a date from a string in ISO 8601 format.

(cls, date_string)

    @classmethod
    def fromisoformat(cls, date_string):
        """Construct a date from a string in ISO 8601 format."""

        if not isinstance(date_string, str):
            raise TypeError('Argument must be a str')

        if not date_string.isascii():
            raise ValueError('Argument must be an ASCII str')

        if len(date_string) not in (7, 8, 10):
            raise ValueError(f'Invalid isoformat string: {date_string!r}')

        try:
            return cls(*_parse_isoformat_date(date_string))
        except Exception:
            raise ValueError(f'Invalid isoformat string: {date_string!r}')

    @classmethod
    def fromisocalendar(cls, year, week, day):