蟒蛇時間（毫秒）計算

Question

如何從下面的代碼計算毫秒。

a = datetime.datetime.now() 
b = datetime.datetime.now() 
c = b - a 

>>> c 

>>> c.days 
0 
>>> c.seconds 
4 
>>> c.microseconds 

Answer 1

milliseconds = (c.days * 24 * 60 * 60 + c.seconds) * 1000 + c.microseconds/1000.0 

Answer 2

或者，新的自2.7：

c.total_seconds()*1000 

（https://docs.python.org/2/library/datetime.html）