On Sat, Jan 24, 2009 at 19:48, bob gailer <bgai...@gmail.com> wrote:
> The problem is: there is no way that I know of to add fundamental types to > Python. Also realize that variables are dynamically typed - so any > assignment can create a variable of a new type. That is why a = 0 results in > an int. > > So one must resort, as others have mentioned, to classes. > Yes, that's what I understood from previous answers. > Framework (untested): > > class Bit: > _value = 0 # default > def __init__(self, value): > self._value = int(bool(value)) > def getvalue(self): > return self._x > def setvalue(self, value): > self._x = int(bool(value)) > value = property(getvalue, setvalue) > def __add__(self, other): # causes + to act as or > self._value |= other > def __mul__(self, other): # causes * to act as and > self._value &= other > > b = Bit(1) > b.value # returns 1 > b.value = 0 > b.value # returns 0 > b.value + 1 # sets value to 1 > b.value * 0 # sets value to 0 > > Wow! that's great. I'll give it a try. It would be great if "b.value = 0" could be just written as "b = 0" without changing type as a result. What happens if every time I want to update the value of "b", I use "b= Bit(0)" , "b=Bit(1)", and so on?? Is like "building" the object each time? It is less efficient, isn't it? You are going to kill me, but... Maybe the solution is not to re-define what already exists —boolean data type, but just using it, as suggested at the beginning of the thread... b = bool(1) b = bool(0) After all, it's not so bad... I'll think about it. -- Vicent
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