[Tutor] list objects are unhashable

[Norman Khine]

Hi,

Sorry, but this did not work.

I have done this, which returns the values I want (sort of)

         for brain in brains:
             x = getattr(brain, horizontal)
             if isinstance(x, list):
                 for item in x:
                     x = item
             else:
                 x
             y = getattr(brain, vertical)
             if isinstance(y, list):
                 for item in y:
                     y = item
             else:
                 y
             if x and y and (x, y) in table:
                 table[(x, y)] += 1
                 table[(x, '')] += 1
                 table[('', y)] += 1
                 table[('', '')] += 1


The only think is that, the totals are correct, but when there is an 
item that is in both, it is counted only once.

Cédric Lucantis wrote:
> Le Monday 30 June 2008 21:31:35, vous avez écrit :
>> Thanks,
>> but where do i replace the x with tuple(x)
>>
> 
> Whenever x is hashed, ie used as a key in a dictionary. You said you have:
> 
>>>>                  table[(x, y)] += 1
>>>> where:
>>>>
>>>> x = ['airlines-scheduled', 'airport-car-parking']
> 
> so you should rather write this (if y is a list too):
> 
> table[(tuple(x), tuple(y))] += 1
> 
> but of course you can also use tuples directly if your lists don't have to be 
> modified:
> 
> x = ('airlines-scheduled', 'airport-car-parking')
> y = (...)
> table[(x, y)] += 1
>