tzcron.py 文件源码

def parse_cron(expression):
    """parses a cron expression into a dict"""
    try:
        minute, hour, monthday, month, weekday, _ = expression.split(' ')
    except ValueError:
        raise InvalidExpression("Invalid number of items in expression: {}"
                                .format(expression))
    result = dict()
    result["bysecond"] = [0]
    if minute != "*":
        result["byminute"] = MinuteParser.parse(minute)
    if hour != "*":
        result["byhour"] = HourParser.parse(hour)
    if monthday != "*":
        result["bymonthday"] = MonthDayParser.parse(monthday)
    if month != "*":
        result["bymonth"] = MonthParser.parse(month)
    if weekday != "*":
        # rrule uses 0 to 6 for monday to sunday
        result["byweekday"] = [d - 1 for d in WeekDayParser.parse(weekday)]

    return result