>>> import datetime
>>> today = datetime.date.today()
# __str__ 的后果应该是可读的:>>> str(today)
'2017-02-02'
# __repr__ 的后果应该是明确的:>>> repr(today)
'datetime.date(2017, 2, 2)'
# Python 解释器会话应用 __repr__ 来查看对象:>>> today
datetime.date(2017, 2, 2)
>>> import datetime
>>> today = datetime.date.today()
# __str__ 的后果应该是可读的:>>> str(today)
'2017-02-02'
# __repr__ 的后果应该是明确的:>>> repr(today)
'datetime.date(2017, 2, 2)'
# Python 解释器会话应用 __repr__ 来查看对象:>>> today
datetime.date(2017, 2, 2)