repr
>>> import datetime>>> today=datetime.datetime.now()>>> today
datetime.datetime(2015, 10, 12, 20, 33, 19, 634000)>>> type(today)
<type 'datetime.datetime'>
>>> #type(today)這是一個時間類型的數據>>> str(today)
'2015-10-12 20:33:19.634000'>>> type(str(today))
<type 'str'>>>> repr(today)#將時間類型的對象轉化為可打印的字符串,原對象不做任何的改變
'datetime.datetime(2015, 10, 12, 20, 33, 19, 634000)'>>> type(repr(today))
<type 'str'>>>> eval(repr(today))
datetime.datetime(2015, 10, 12, 20, 33, 19, 634000)
>>>
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