Python how can I check whether an object is of type datetime date

Question

I have tried a few obvious options but none of them works   In  150   x Out 150   datetime date 2012  9  1   In  151   type x  Out 151   datetime date  In  152   isinstance x  datetime date  --------------------------------------------------------------------------- TypeError                                 Traceback  most recent call last   lt ipython-input-152-9a298ea6fce5 gt  in  lt module gt    ---- gt  1 isinstance x  datetime date   TypeError  isinstance   arg 2 must be a class  type  or tuple of classes and types  In  153   x is datetime date Out 153   False  In  154   type x  is datetime date Out 154   False   What is the right way of doing this

User · Accepted Answer

i believe the reason it is not working in your example is that you have imported datetime like so :

from datetime import datetime

this leads to the error you see

In [30]: isinstance(x, datetime.date)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/<ipython-input-30-9a298ea6fce5> in <module>()
----> 1 isinstance(x, datetime.date)

TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and types

if you simply import like so :

import datetime

the code will run as shown in all of the other answers

In [31]: import datetime

In [32]: isinstance(x, datetime.date)
Out[32]: True

In [33]:

User · Answer

In Python 3 5  isinstance x  date  works to me    gt  gt  gt  from datetime import date  gt  gt  gt  x   date 2012  9  1   gt  gt  gt  type x   lt class  datetime date  gt   gt  gt  gt  isinstance x  date  True  gt  gt  gt  type x  is date True

User · Answer

If you are using freezegun package in tests you may need to have more smart isinstance checks which works well with FakeDate and original Date Datetime beeing inside with freeze time context  def isinstance date value        quot  quot  quot Safe replacement for isinstance date which works smoothly also with Mocked freezetime quot  quot  quot      import datetime     if isinstance value  datetime date  and not isinstance value  datetime datetime           return True     elif type datetime datetime today   date       type value           return True     else          return False   def isinstance datetime value        quot  quot  quot Safe replacement for isinstance datetime which works smoothly also with Mocked freezetime  quot  quot  quot      import datetime     if isinstance value  datetime datetime           return True     elif type datetime datetime now       type value           return True     else          return False   and tests to verify the implementation class TestDateUtils TestCase        def setUp self           self date orig   datetime date 2000  10  10          self datetime orig   datetime datetime 2000  10  10           with freeze time  2001-01-01                self date freezed   datetime date 2002  10  10              self datetime freezed   datetime datetime 2002  10  10       def test isinstance date self           def check                self assertTrue isinstance date self date orig               self assertTrue isinstance date self date freezed               self assertFalse isinstance date self datetime orig               self assertFalse isinstance date self datetime freezed               self assertFalse isinstance date None            check           with freeze time  2005-01-01                check        def test isinstance datetime self           def check                self assertFalse isinstance datetime self date orig               self assertFalse isinstance datetime self date freezed               self assertTrue isinstance datetime self datetime orig               self assertTrue isinstance datetime self datetime freezed               self assertFalse isinstance datetime None            check           with freeze time  2005-01-01                check

User · Answer

import datetime d   datetime date 2012  9  1  print type d  is datetime date   gt  True

User · Answer

According to documentation class date is a parent for class datetime  And isinstance   method will give you True in all cases  If you need to distinguish datetime from date you should check name of the class  import datetime  datetime datetime now     class     name       date   False datetime datetime now     class     name       datetime   True datetime date today     class     name       date   True datetime date today     class     name       datetime   False   I ve faced with this problem when i have different formatting rules for dates and dates with time

User · Answer

If your existing code is already relying on from datetime import datetime  you can also simply also import date  from datetime import datetime  timedelta  date print isinstance datetime today   date    date

User · Answer

right way is  import datetime isinstance x  datetime date    When I try this on my machine it works fine   You need to look into why datetime date is not a class   Are you perhaps masking it with something else  or not referencing it correctly for your import

[python] Python: how can I check whether an object is of type datetime.date?

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