Python: How to add a static class array of objects?

Question

i'm a python newbie! I'm playing with class, lists and dictionary and i have a problem!

i have this piece of code:

class Vacca( object ):
    Munte = dict()

    def __init__( self, nr ):
        self.nome = "VACCA_" + str( nr )
        self.numero = str(nr)
        self.mungiture = []

    def mungi( self, latte ):
        nr = self.numero
        Vacca.Munte[ nr ] = self
        Vacca.Munte[ nr ].mungiture.append( latte )

vacca = Vacca( 1 )
vacca.mungi( "white milk" )

vacca = Vacca( 1 )
vacca.mungi( "black milk" )

vacca = Vacca( 1 )
vacca.mungi( "yellow milk" )

vacca = Vacca( 2 )
vacca.mungi( "dark chocolate" )

for v in Vacca.Munte:
    print Vacca.Munte[v].mungiture

If i run this is the result:

['yellow milk']
['dark chocolate']

but i need this:

['white milk','black milk','yellow milk']
['dark chocolate']

what i'm wrong?

rafaelc · Accepted Answer · 2015-04-29 20:29:01Z

4

The problem is that you overwrite the object each time you do vacca = Vacca(1) and erase everything you've done before!

Do like this instead:

vacca = Vacca( 1 )
vacca.mungi( "white milk" )
vacca.mungi( "black milk" )
vacca.mungi( "yellow milk" )

answered Apr 29, 2015 at 20:29

rafaelc

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