Re: [Tutor] Basic question -> How to use a class from a file?

[Rich Krauter]

Bernard Lebel wrote:
Okay here comes the next question.
In that class, I have 3 functions. Actually, one of them calls the two 
others.

However when I call these functions (wich are placed before the caller 
in the file), I get an error saying that the global name x (the function 
name) is not defined.

What am I doing wrong?


Hi Bernard,
This is just a guess since you didn't post your code, but did you call 
the 'bare' methods in your class definition, rather than calling the 
methods through an instance (which is usually called 'self' inside class 
definitions)?

I think the following may be similar to what you wanted to do:
class A(object):
    def __init__(self,data=None):
        self.data = data
    def methodA(self):
        self.methodB()
        self.methodC()
    def methodB(self):
        print "in methodB"
        print self.data
    def methodC(self):
        print "in methodC"
        print self.data
if __name__ == '__main__':
    a1 = A(5)
    a1.methodA()
    a2 = A([1,2,3])
    a2.methodA()
Hope this helps.
Rich
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