python取得當前星期幾

用Python怎麼取得當前的星期數呢?比如今天是星期1,就顯示星期1        方法有很多種:    方法一:        >>> from time import time,localtime,strftime    >>> x=localtime(time())    >>> strftime("%a",x)    'Thu'    >>> strftime("%A",x)    'Thursday'    >>>    >>>    >>>    >>> import datetime    >>> d=datetime.datetime.now()    >>> d.weekday()    3    >>> #0代表周日                方法二:    >>> import time  >>> a=time.localtime()  >>> print a  (2010, 8, 19, 11, 29, 4, 3, 231, 0)  >>> time.strftime("%A",a)  'Thursday'  >>> time.strftime("%w",a)  '4'