operator module functions

Chris Angelico rosuav at gmail.com
Thu Oct 9 00:30:31 CEST 2014


On Thu, Oct 9, 2014 at 8:37 AM, Gregory Ewing
<greg.ewing at canterbury.ac.nz> wrote:
> Chris Angelico wrote:
>
>>>>> operator.add is operator.__add__
>>
>> True
>
>
> That doesn't always seem to have been the case, however.
> In Python 2.7 and 3.3, I get
>
>>>> operator.add is operator.__add__
> False

Huh. So it is.

rosuav at sikorsky:~$ python3
Python 3.5.0a0 (default:301b9a58021c, Oct  2 2014, 09:20:24)
[GCC 4.7.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import operator
>>> operator.add, operator.__add__
(<built-in function add>, <built-in function add>)
>>>
rosuav at sikorsky:~$ python
Python 2.7.3 (default, Mar 13 2014, 11:03:55)
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import operator
>>> operator.add, operator.__add__
(<built-in function add>, <built-in function __add__>)
>>>

Presumably they have the same code behind them, just different
function names. But anyway, the fact that it doesn't throw back an
AttributeError proves that both functions do at least exist.

Learn something new every day!

ChrisA



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