code: def _iso_to_gregorian(iso_year, iso_week, iso_day):
      "Gregorian calendar date for the given ISO year, week and day"
      year_start = _iso_year_start(iso_year)
      return year_start + dt.timedelta(days=iso_day-1, weeks=iso_week-1f _iso_to_gregorian(iso_year, iso_week, iso_day):
      "Gregorian calendar date for the given ISO year, week and day"
      year_start = _iso_year_start(iso_year)
      return year_start + dt.timedelta(days=iso_day-1, weeks=iso_week-1)
docs: Gregorian calendar date for the given ISO year, week and day