[Tutor] Logic error / poor understanding of classes?

[Liam Clarke]

Hi all, 


Having an issue... creating a couple of methods in a class, and
hitting a strange error.


def genWin(self):
        self.Show(0)
        
        #Get dict vals of CM's and teams as (name, team) tuple
        tuplesToGen=self.sortAndTuple()
        print 'z point'
        print tuplesToGen
        
    def sortAndTuple(self):
        listOTuples=self.cmList.items()
        print listOTuples
        print 'List presort'
        print self.sortSetting

        if self.sortSetting == 0:
            print 'x point'
            listOTuples.sort()
            print 'y point'
            print listOTuples
            return listOTuples
        
        elif self.sortSetting == 1:
            schwartzList = [ (item[1],item) for item in listOTuples ]
            schwartzList.sort()
            listOTuples  = [ item[1] for item in schwartzList ]
            print'No, wrong'
            return listOTuples

So this is within a class, and genWin calls sortAndTuple() to sort the
list by alphabetical order of either value.

So, self.sortSetting is 0, so it should sort alphabetically... this is
the console output I get -

[('Carla', 'ECM'), ('Dave', 'ABC') <etc. etc.> ]
List presort
0
z point
None

So my expected list of tuples is fine, and self.sortSetting is 0, as
it should be...

but, what happened to 'x' point and 'y' point? And also, why is my
method returning None?
self.sortSetting is not 0? 

If I replace 

 elif self.sortSetting == 1:

with else:

it runs that clause fine, so what am I doing wrong? Oh, and if I place a
print self.sortSetting command in the else clause, it prints zero...

So, I know what the problem is, just not why it's happening.
It is generating no error message for a missing var,  and I'm sure
it's a quirk of classes or (more likely) my limited knowledge.

Can you not return values from one method to another in a class? Or,
am I missing something like passing the calling function as a
parameter i.e.

tuplesToGen=self.sortAndTuple(self)

or should I be passing self.sortSetting as an argument? I think I'm
treating it as a global variable at the moment.

Regards,

(a Confused) Liam Clarke
-- 
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.