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Sane · Jun 2nd, 2006, 9:27 PM

I'm trying to achieve a simple solution to requiring to pack a value alongside an integer, so it can be easily remembered at a later time.

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class keep_index:
    def __init__(self, value, index):
        self.value = str(value)
        self.index = index
        
    def __call__(self):
        return self.index
    
    def __str__(self):
        return self.value

x = keep_index(4, 1)
print x
print x()

As you can see, this works. Printing x, prints out 4. But calling it returns a value I added alongside it. However, it is a string in my example, not an integer. I have tried __int__ instead of __str__ of course. That was my first attempt, but that doesn't work.

Since I got this far by trial and error by dir()'ing some of the classes like "int" and "str", I may be missing something blatantly obvious. Sorry to be a pain.

Another problem, is if I put 'x' inside a list, and print the list, it displays the function address rather then the value of ".value". And I'd rather not change the concept behind how this is working. I believe that packing an "invisible" value alongside the original would work beautifully.

Jun 2nd, 2006, 9:27 PM	#1
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 2,013 Rep Power: 6	More Abstract Use Of Class Methods I'm trying to achieve a simple solution to requiring to pack a value alongside an integer, so it can be easily remembered at a later time. (Toggle Plain Text) class keep_index: def __init__(self, value, index): self.value = str(value) self.index = index def __call__(self): return self.index def __str__(self): return self.value x = keep_index(4, 1) print x print x() class keep_index: def __init__(self, value, index): self.value = str(value) self.index = index def __call__(self): return self.index def __str__(self): return self.value x = keep_index(4, 1) print x print x() As you can see, this works. Printing x, prints out 4. But calling it returns a value I added alongside it. However, it is a string in my example, not an integer. I have tried __int__ instead of __str__ of course. That was my first attempt, but that doesn't work. Since I got this far by trial and error by dir()'ing some of the classes like "int" and "str", I may be missing something blatantly obvious. Sorry to be a pain. Another problem, is if I put 'x' inside a list, and print the list, it displays the function address rather then the value of ".value". And I'd rather not change the concept behind how this is working. I believe that packing an "invisible" value alongside the original would work beautifully.