Re: Calling a class method

[Walter Brameld IV]

vsoler wrote:
I have the following script:
class TTT(object):
    def duplica(self):
        self.data *= 2
    def __init__(self, data):
        self.data = data
        TTT.duplica(self.data)
    def __str__(self):
        return str(self.data)

print
obj=TTT(7)
print obj

And I want 14 printed (twice 7)

I got the following error:
TypeError: unbound method duplica() must be called with TTT instance
as first argument (got int instance instead)

What am I doing wrong?

duplica() takes a 'self' parameter (a TTT instance), but you're calling 
it with self.data (an int instance).  Change this line:

TTT.duplica(self.data)

to this:

TTT.duplica(self)

and it will do what you want.
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