Class problems.

special_dragonfly Dominic at PLEASEASK.co.uk
Tue Aug 14 14:59:16 CEST 2007


Hello,
I'm having problems retrieving data I think I've put into my program. I have 
a class and a function. I'm reading in from a personally made text file of 
the data needed for the class. The FieldsDictionary needs to be accesable 
outside the function, but my problem is this:
the print FieldsDictionary[key].Fieldname (which I should have just created 
because of the line above), returns:
AttributeError: 'list' object has no attribute 'Fieldname'
am I just accessing it wrongly?
I was under the impression that Fields Dictionary should contain a key 
referencing to a list of instances of the class. i.e. 
FieldsDictionary{key:[instance1, instance2, instance 3]}
Is this not what I've programmed?

class FieldClass(object):
    def 
__init__(self,Fieldname="",Fieldlength=0,Type=["A","S","N"],Location=["D","C","L","H","TBA"]):
        self.Fieldname=Fieldname
        self.Fieldlength=Fieldlength
        self.Type=Type
        self.Location=Location

def 
EnterDictionary(FieldsDictionary,key,myfile,FIELD_QUANTITY_OFFSET,LINE_START,LINE_END):
    data=myfile.readline().strip()
    for i in range(int(data[FIELD_QUANTITY_OFFSET:])):
        args =myfile.readline().strip()[LINE_START:LINE_END].split(",")
        print args
        FieldsDictionary.setdefault(key, []).append(FieldClass(*args))
        print FieldsDictionary[key].Fieldname 





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