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Date: Wed, 8 Jun 2011 13:34:49 -0700
Subject: Re: Of Functions, Objects, and Methods-I NEED HELP PLEASE
From: Benjamin Kaplan <benjamin.kaplan@case.edu>
To: python-list@python.org
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On Wed, Jun 8, 2011 at 1:09 PM, Cathy James <nambo4jb@gmail.com> wrote:
> I am almost there, but I need a little help:
>
> I would like to
>
> a) print my dogs in the format =A0index. name: breed as follows:
>
> 0. Mimi:Poodle
> 1.Sunny: Beagle
> 2. Bunny: German Shepard
> I am getting
>
> (0, ('Mimi', 'Poodle')) . Mimi : Poodle instead-what have I done wrong?
>
> b) I would like to append to my list, but my line dogs.dogAppend() is
> giving a TypeError:
>
> for i in enumerate (self.dogAppend()):
> TypeError: 'list' object is not callable
>
> Any help?
>
> #MY CODE BELOW:
>
> import sys
> class Dog():
> =A0 =A0def __init__(self, name, breed):
> =A0 =A0 =A0 =A0self.name =3D name
> =A0 =A0 =A0 =A0self.breed =3D breed
>
> =A0 =A0def dogAppend(self):
> =A0 =A0 =A0 =A0self.dogAppend =3D []
> =A0 =A0 =A0 =A0self.dogAppend.append((self.name,self.breed))
> =A0 =A0 =A0 =A0return self.dogAppend
>

In Python, everything is an object. And when we say everything, we
really do mean everything. A function is an object too. So when you do
self.dogAppend =3D [], you're replacing self.dogAppend (the function
object) with a list.

>
> =A0 =A0def display (self):
> =A0 =A0 =A0 =A0for i in enumerate (self.dogAppend()):

I don't know what you're trying to do here, because this makes no
sense. dogAppend is going to return a list of a single object, so it's
going to be 0 every time. And enumerate returns two things: the index
and the object. Since you only specified one variable, you get the
tuple of (index, object) which is what you're seeing.

You're supposed to do :

    for i, dog in enumerate(a_list_of_all_the_dogs) :
 =A0 =A0 =A0 =A0 =A0 =A0print (i,".", =A0dog.name, ": " + dog.breed)

for what you're  trying to get.

>
> if __name__ =3D=3D "__main__":
> =A0 =A0dogs =3D Dog(name=3Dinput (" Enter Dog Name: "), breed=3Dinput ("E=
nter
> Dog Breed: "))
> =A0 =A0while not dogs:
> =A0 =A0 =A0 =A0print("Goodbye!!")
> =A0 =A0 =A0 =A0sys.exit()
> =A0 =A0else:
> =A0 =A0 =A0 =A0#dogs.dogAppend()
> =A0 =A0 =A0 =A0dogs.display()
> --
> http://mail.python.org/mailman/listinfo/python-list
>