Python 中的日期时间格式
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Date Time Formats in Python
提问by user1579970
What are these date-time formats? I need to convert them to the same format, to check if they are the same. These are just two coming from separate data source, so I need to find a way to make them the same format. Any ideas?
这些日期时间格式是什么？我需要将它们转换为相同的格式，以检查它们是否相同。这些只是来自不同数据源的两个，因此我需要找到一种方法使它们具有相同的格式。有任何想法吗？
2013-07-12T07:00:00Z
2013-07-12T07:00:00Z
2013-07-10T11:00:00.000Z
2013-07-10T11:00:00.000Z
Thanks in advance
提前致谢
回答by Sudipta
That extra .000is micro seconds.
额外的时间.000是微秒。
This will convert a date string of a format to datetime object.
这会将格式的日期字符串转换为日期时间对象。
import datetime
d1 = datetime.datetime.strptime("2013-07-12T07:00:00Z","%Y-%m-%dT%H:%M:%SZ")
d2 = datetime.datetime.strptime("2013-07-10T11:00:00.000Z","%Y-%m-%dT%H:%M:%S.%fZ")
Then convert them into any format depending on your requirement, by using:
然后根据您的要求将它们转换为任何格式，使用：
new_format = "%Y-%m-%d"
d1.strftime(new_format)
回答by monkut
perhaps use .isoformat()
也许使用 .isoformat()
string in ISO 8601 format, YYYY-MM-DDTHH:MM:SS[.mmmmmm][+HH:MM]
ISO 8601 格式的字符串，YYYY-MM-DDTHH:MM:SS[.mmmmmm][+HH:MM]
>>> import datetime
>>> datetime.datetime.utcnow().isoformat() + "Z"
'2013-07-11T22:26:51.564000Z'
>>>
Zspecifies "zulu" time or UTC.
Z指定“zulu”时间或UTC。
You can also add the timezone component by making your datetime object timezone awareby applying the appropriate tzinfoobject. With the tzinfoapplied the .isoformat()method will include the appropriate utc offset in the output:
您还可以通过应用适当的tzinfo对象使您的日期时间对象时区感知来添加时区组件。与tzinfo施加的方法将包括适当的UTC的输出偏移：.isoformat()
>>> d = datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)
>>> d.isoformat()
'2019-11-11T00:52:43.349356+00:00'
You can remove the microsecondsby change the microsecondsvalue to 0:
您可以删除微秒的变化微秒重视到0：
>>> no_ms = d.replace(microsecond=0)
>>> no_ms.isoformat()
'2019-11-11T00:52:43+00:00'
Also, as of python 3.7the .fromisoformat()method is available to load an iso formatted datetime string into a python datetime object:
此外，从python 3.7 开始，该.fromisoformat()方法可用于将 iso 格式的日期时间字符串加载到 python 日期时间对象中：
>>> datetime.datetime.fromisoformat('2019-11-11T00:52:43+00:00')
datetime.datetime(2019, 11, 11, 0, 52, 43, tzinfo=datetime.timezone.utc)
回答by Johan Stiven Hernandez Osorio
you can try to trim the string
你可以尝试修剪字符串
data = "2019-10-22T00:00:00.000-05:00"
result1 = datetime.datetime.strptime(data[0:19],"%Y-%m-%dT%H:%M:%S")
result2 = datetime.datetime.strptime(data[0:23],"%Y-%m-%dT%H:%M:%S.%f")
result3 = datetime.datetime.strptime(data[0:9], "%Y-%m-%d")
回答by Hitman
* Short and best way:
*简短而最好的方法：
str(datetime.datetime.now()).replace(' ','T')
or
str(datetime.datetime.now()).replace(' ','T') + "Z"
回答by Uday Kiran
use datetime module.
使用日期时间模块。
For a variable
对于一个变量
import datetime
def convertDate(d):
new_date = datetime.datetime.strptime(d,"%Y-%m-%dT%H:%M:%S.%fZ")
return new_date.date()you can change the ".date()" to ".year", ".month", ".day" etc...
convertDate("2019-12-23T00:00:00.000Z")
Output: # is now a datetime object
输出：#现在是一个日期时间对象
datetime.date(2019, 12, 23)
For a DataFrame column, use apply()
对于 DataFrame 列，使用 apply()
df['new_column'] = df['date_column'].apply(convertDate)
