Method _offset_dt

src/pptx/oxml/coreprops.py:213–226

Return |datetime| instance offset from `datetime` by offset specified in `offset_str`. `offset_str` is a string like `'-07:00'`.

(cls, datetime: dt.datetime, offset_str: str)

    @classmethod
    def _offset_dt(cls, datetime: dt.datetime, offset_str: str):
        """Return |datetime| instance offset from `datetime` by offset specified in `offset_str`.

        `offset_str` is a string like `'-07:00'`.
        """
        match = cls._offset_pattern.match(offset_str)
        if match is None:
            raise ValueError(f"{repr(offset_str)} is not a valid offset string")
        sign, hours_str, minutes_str = match.groups()
        sign_factor = -1 if sign == "+" else 1
        hours = int(hours_str) * sign_factor
        minutes = int(minutes_str) * sign_factor
        td = dt.timedelta(hours=hours, minutes=minutes)
        return datetime + td

    _offset_pattern = re.compile(r"([+-])(\d\d):(\d\d)")