使用毫秒将日期时间格式化为字符串

Question

我希望datetime从日期开始有一个字符串,以毫秒为单位.这段代码对我来说很典型,我很想学会如何缩短它.

from datetime import datetime

timeformatted= str(datetime.utcnow())
semiformatted= timeformatted.replace("-","")
almostformatted= semiformatted.replace(":","")
formatted=almostformatted.replace(".","")
withspacegoaway=formatted.replace(" ","")
formattedstripped=withspacegoaway.strip()
print formattedstripped

Answer 1

要获取具有毫秒(秒后3位小数)的日期字符串,请使用以下命令:

from datetime import datetime

print datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3]

>>>> OUTPUT >>>>
2020-05-04 10:18:32.926

Answer 2

使用Python 3.6，您可以使用：

from datetime import datetime
datetime.utcnow().isoformat(sep=' ', timespec='milliseconds')

输出：

'2019-05-10 09:08:53.155'

此处提供更多信息：https : //docs.python.org/3/library/datetime.html#datetime.datetime.isoformat

Answer 3

print datetime.utcnow().strftime('%Y%m%d%H%M%S%f')

http://docs.python.org/library/datetime.html#strftime-strptime-behavior

Answer 4

@Cabbi提出了一些问题,在某些系统上,微秒格式%f可能会给出"0",所以简单地删除最后三个字符是不可移植的.

以下代码使用毫秒仔细格式化时间戳:

from datetime import datetime
(dt, micro) = datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f').split('.')
dt = "%s.%03d" % (dt, int(micro) / 1000)
print dt

示例输出:

2016-02-26 04:37:53.133

为了获得OP想要的确切输出,我们必须删除标点字符:

from datetime import datetime
(dt, micro) = datetime.utcnow().strftime('%Y%m%d%H%M%S.%f').split('.')
dt = "%s%03d" % (dt, int(micro) / 1000)
print dt

示例输出:

20160226043839901

Answer 5

大概是这样的：

import datetime
now = datetime.datetime.now()
now.strftime('%Y/%m/%d %H:%M:%S.%f')[:-3]  
# [:-3] => Removing the 3 last characters as %f is for microsecs.

Answer 6

import datetime

# convert string into date time format.

str_date = '2016-10-06 15:14:54.322989'
d_date = datetime.datetime.strptime(str_date , '%Y-%m-%d %H:%M:%S.%f')
print(d_date)
print(type(d_date)) # check d_date type.


# convert date time to regular format.

reg_format_date = d_date.strftime("%d %B %Y %I:%M:%S %p")
print(reg_format_date)

# some other date formats.
reg_format_date = d_date.strftime("%Y-%m-%d %I:%M:%S %p")
print(reg_format_date)
reg_format_date = d_date.strftime("%Y-%m-%d %H:%M:%S")
print(reg_format_date)

<<<<<< 输出>>>>>>

2016-10-06 15:14:54.322989    
<class 'datetime.datetime'>    
06 October 2016 03:14:54 PM    
2016-10-06 03:14:54 PM    
2016-10-06 15:14:54