Julien Cigar ha scritto:
> Glauco wrote:
>
>> Julien Cigar ha scritto:
>>
>>
>>> Hi list,
>>>
>>> With the following :
>>>
>>> >>> a = Invasive.get(67).habitats
>>> >>> b = Invasive.get(57).habitats
>>> >>> type(a), type(b)
>>> (<class 'sqlalchemy.orm.attributes.InstrumentedList'>, <class
>>> 'sqlalchemy.orm.attributes.InstrumentedList'>)
>>> >>> a == b
>>> True
>>> >>> a
>>> [<tgias.models.habitat.Habitat object at 0x8d635ec>,
>>> <tgias.models.habitat.Habitat object at 0x8d5d8ec>]
>>> >>> b
>>> [<tgias.models.habitat.Habitat object at 0x8d635ec>,
>>> <tgias.models.habitat.Habitat object at 0x8d5d8ec>]
>>> >>> a.reverse()
>>> >>> a
>>> [<tgias.models.habitat.Habitat object at 0x8d5d8ec>,
>>> <tgias.models.habitat.Habitat object at 0x8d635ec>]
>>> >>> b
>>> [<tgias.models.habitat.Habitat object at 0x8d635ec>,
>>> <tgias.models.habitat.Habitat object at 0x8d5d8ec>]
>>> >>> a == b
>>> False
>>>
>>> Would it not be logical to have True instead of False for the last
>>> statement ?
>>>
>>>
>> I don't think so, because the default order is an information !
>>
>>
>> a == b is a comparo of content so [1,2,3] is different than [3,2,1]
>> sometimes ordering in presentation of data is a useful information.
>>
>>
>>
>
> yes of course [1,2,3] is different than [3,2,1] (hopefully), I was
> talking for InstrumentedList, not tuple or list or ...
>
see: http://www.sqlalchemy.org/docs/datamapping.html
""" By default it represents a list: """
Glauco
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Glauco Uri - Programmatore
glauco(at)allevatori.com
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