[英]Microsecond part lost when converting a date string to a datetime object in python
我有以下日期字符串:
dtstr = '2010-12-19 03:44:34.778000'
我想將它轉換為日期時間對象,所以我繼續如下:
import time
from datetime import datetime
dtstr = '2010-12-19 03:44:34.778000'
format = "%Y-%m-%d %H:%M:%S.%f"
datetime.fromtimestamp(time.mktime(time.strptime(dtstr,format)))
但是返回了: datetime.datetime(2010, 12, 19, 3, 44, 34)
datetime.datetime(2010, 12, 19, 3, 44, 34,778000)
而不是datetime.datetime(2010, 12, 19, 3, 44, 34,778000)
為什么微秒部分被省略了? 我怎樣才能獲得datetime.datetime(2010, 12, 19, 3, 44, 34,778000)
?
請幫助謝謝
from datetime import datetime
dtstr = '2010-12-19 03:44:34.778000'
format = "%Y-%m-%d %H:%M:%S.%f"
a = datetime.strptime(dtstr,format)
print a.microsecond
time
處理自Unix紀元以來的秒數,因此使用time
會丟失微秒。 直接使用datetime.strptime
。
該time.struct_time
通過返回的對象time.strptime
不存儲毫秒:
In [116]: time.strptime(dtstr,"%Y-%m-%d %H:%M:%S.%f",)
Out[116]: time.struct_time(tm_year=2010, tm_mon=12, tm_mday=19, tm_hour=3, tm_min=44, tm_sec=34, tm_wday=6, tm_yday=353, tm_isdst=-1)
但是dt.datetime.strptime
返回的datetime對象確實存儲了毫秒:
In [117]: import datetime as dt
In [118]: dt.datetime.strptime(dtstr,"%Y-%m-%d %H:%M:%S.%f")
Out[118]: datetime.datetime(2010, 12, 19, 3, 44, 34, 778000)
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