在Python中以YYYY-MM-DD获取今天的日期？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/32490629/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Getting today's date in YYYY-MM-DD in Python?
提问by Pyderman
I'm using:
我正在使用：
str(datetime.datetime.today()).split()[0]
to return today's date in the YYYY-MM-DDformat.
以YYYY-MM-DD格式返回今天的日期。
Is there a less crude way to achieve this?
有没有更简单的方法来实现这一目标？
采纳答案by diegueus9
You can use strftime:
您可以使用strftime：
from datetime import datetime
datetime.today().strftime('%Y-%m-%d')
Additionally, for anyone also looking for a zero-padded Hour, Minute, and Second at the end: (Comment by Gabriel Staples)
此外，对于任何也在最后寻找零填充的小时、分钟和秒的人：（Gabriel Staples评论）
datetime.today().strftime('%Y-%m-%d-%H:%M:%S')
回答by Bill Bell
Datetime is just lovely if you like remembering funny codes. Wouldn't you prefer simplicity?
如果您喜欢记住有趣的代码，Datetime 就很可爱。你不喜欢简单吗？
>>> import arrow
>>> arrow.now().format('YYYY-MM-DD')
'2017-02-17'
This module is clever enough to understand what you mean.
这个模块足够聪明，可以理解你的意思。
Just do pip install arrow.
就做pip install arrow。
Addendum: In answer to those who become exercised over this answer let me just say that arrow represents one of the alternativeapproaches to dealing with dates in Python. That's mostly what I meant to suggest.
附录：为了回答那些对这个答案感到困惑的人，我只想说箭头代表了在 Python 中处理日期的另一种方法。这主要是我想建议的。
回答by kmonsoor
You can use datetime.date.today()and convert the resulting datetime.dateobject to a string:
您可以使用datetime.date.today()结果datetime.date对象并将其转换为字符串：
from datetime import date
today = str(date.today())
print(today) # '2017-12-26'
回答by plhn
I prefer this, because this is simple, but maybe somehow inefficient and buggy. You must check the exit code of shell command if you want a stronglyerror-proof program.
我更喜欢这个，因为这很简单，但也许效率低下且有问题。如果你想要一个强大的防错程序，你必须检查 shell 命令的退出代码。
os.system('date +%Y-%m-%d')
回答by JdH
I always use the isoformat()function for this.
我总是isoformat()为此使用该功能。
from datetime import date
today = date.today().isoformat()
print(today) # '2018-12-05'
Note that this also works on datetime objects if you need the time in standard format as well.
请注意，如果您还需要标准格式的时间，这也适用于日期时间对象。
from datetime import datetime
now = datetime.today().isoformat()
print(now) # '2018-12-05T11:15:55.126382'
回答by cs95
Other answers suggest the use of python's datetime.datetime, but as @Bill Bell said, there are other libraries that offer simpler datetimeinterfaces either as a service or as part of a larger ecosystem of APIs. Here are two such libraries that make working with datetimesvery simple.
其他答案建议使用 python 的datetime.datetime，但正如@Bill Bell 所说，还有其他库提供更简单的datetime接口作为服务或作为更大的 API 生态系统的一部分。这里有两个这样的库，它们使工作变得datetimes非常简单。
PANDAS
熊猫
You can use pd.to_datetimefrom the pandaslibrary. Here are various options, depending on what you want returned.
您可以pd.to_datetime从熊猫库中使用。这里有各种选项，具体取决于您想要返回的内容。
import pandas as pd
pd.to_datetime('today') # pd.to_datetime('now')
# Timestamp('2019-03-27 00:00:10.958567')
As a python datetimeobject,
作为 python日期时间对象，
pd.to_datetime('today').to_pydatetime()
# datetime.datetime(2019, 4, 18, 3, 50, 42, 587629)
As a formatted date string,
作为格式化的日期字符串，
pd.to_datetime('today').isoformat()
# '2019-04-18T04:03:32.493337'
# Or, `strftime` for custom formats.
pd.to_datetime('today').strftime('%Y-%m-%d')
# '2019-03-27'
To get just the date from the timestamp, call Timestamp.date.
要仅从时间戳中获取日期，请调用Timestamp.date。
pd.to_datetime('today').date()
# datetime.date(2019, 3, 27)
Aside from to_datetime, you can directly instantiate a Timestampobject using,
除了to_datetime，您还可以Timestamp使用以下方法直接实例化对象，
pd.Timestamp('today') # pd.Timestamp('now')
# Timestamp('2019-04-18 03:43:33.233093')
pd.Timestamp('today').to_pydatetime()
# datetime.datetime(2019, 4, 18, 3, 53, 46, 220068)
If you want to make your Timestamp timezone aware, pass a timezone to the tzargument.
如果您想让 Timestamp 时区知道，请将时区传递给tz参数。
pd.Timestamp('now', tz='America/Los_Angeles')
# Timestamp('2019-04-18 03:59:02.647819-0700', tz='America/Los_Angeles')
PENDULUM
摆
If you're working with pendulum, there are some interesting choices. You can get the current timestamp using now()or today's date using today().
如果您正在使用pendulum，那么有一些有趣的选择。您可以使用 获取当前时间戳now()或使用今天的日期today()。
import pendulum
pendulum.now()
# DateTime(2019, 3, 27, 0, 2, 41, 452264, tzinfo=Timezone('America/Los_Angeles'))
pendulum.today()
# DateTime(2019, 3, 27, 0, 0, 0, tzinfo=Timezone('America/Los_Angeles'))
Additionally, you can also get tomorrow()or yesterday()'s date directly without having to do any additional timedelta arithmetic.
此外，您还可以直接获取tomorrow()oryesterday()的日期，而无需进行任何额外的 timedelta 算术。
pendulum.yesterday()
# DateTime(2019, 3, 26, 0, 0, 0, tzinfo=Timezone('America/Los_Angeles'))
pendulum.tomorrow()
# DateTime(2019, 3, 28, 0, 0, 0, tzinfo=Timezone('America/Los_Angeles'))
There are various formatting options available.
有多种格式选项可用。
pendulum.now().to_date_string()
# '2019-03-27'
pendulum.now().to_formatted_date_string()
# 'Mar 27, 2019'
pendulum.now().to_day_datetime_string()
# 'Wed, Mar 27, 2019 12:04 AM'
回答by Mohideen bin Mohammed
You can use,
您可以使用，
>>> from datetime import date
>>> date.today().__str__()
'2019-10-05'
回答by CONvid19
import time
today = time.strftime("%Y-%m-%d")
# 2020-02-14
