making objects with individual attributes!

[Alejandro]

I have created a class:

class document:

titre = ''
haveWords = set()

def __init__(self, string):

self.titre = string

#########

doc1 = document('doc1' )
doc2 = document('doc2' )

doc1.haveWords. add(1)
doc2.haveWords. add(2)


print doc1.haveWords

# i get set([1, 2])


doc1 and doc are sharing attribute haveWords!
Why ??? there's a way to assign every objetc "document" a different
"set"

[kyosohma@gmail.com]

Re: making objects with individual attributes!

On Mar 20, 11:08 am, "Alejandro" <altud...@yahoo .comwrote:

I have created a class:
>
class document:
>
titre = ''
haveWords = set()
>
def __init__(self, string):
>
self.titre = string
>
#########
>
doc1 = document('doc1' )
doc2 = document('doc2' )
>
doc1.haveWords. add(1)
doc2.haveWords. add(2)
>
print doc1.haveWords
>
# i get set([1, 2])
>
doc1 and doc are sharing attribute haveWords!
Why ??? there's a way to assign every objetc "document" a different
"set"

You're just slightly off. The code needs to be more like this:

class document:

def __init__(self, string):

self.titre = string
self.haveWords = set()

############### ###

I think what you did was create some kind of global variable that was
then accessible through the namespace. But I really don't know for
sure. This code seems to work now, though.

Mike

[Gary Herron]

Re: making objects with individual attributes!

Alejandro wrote:

I have created a class:
>
class document:
>
titre = ''
haveWords = set()
>
def __init__(self, string):
>
self.titre = string
>
#########
>
doc1 = document('doc1' )
doc2 = document('doc2' )
>
doc1.haveWords. add(1)
doc2.haveWords. add(2)
>
>
print doc1.haveWords
>
# i get set([1, 2])
>
>
doc1 and doc are sharing attribute haveWords!
Why ??? there's a way to assign every objetc "document" a different
"set"
>

Of course. Try this:

class document:
def __init__(self, string):
self.titre = string
self.haveWords = set()

Each instance creation will call __init__ with the instance
accessible through self, and that code will create two instance
specific attributes.

Don't use so called class level attributes (as in your example)
unless you *want* sharing between all instances of a class.

Gary Herron

[Diez B. Roggisch]

Re: making objects with individual attributes!

Alejandro wrote:

I have created a class:
>
class document:
>
titre = ''
haveWords = set()
>
def __init__(self, string):
>
self.titre = string
>
#########
>
doc1 = document('doc1' )
doc2 = document('doc2' )
>
doc1.haveWords. add(1)
doc2.haveWords. add(2)
>
>
print doc1.haveWords
>
# i get set([1, 2])
>
>
doc1 and doc are sharing attribute haveWords!
Why ??? there's a way to assign every objetc "document" a different
"set"

Yes, by using instance-attributes instead of class-attributes, as you do.

Btw, it's common to name classes in python with a capital first letter, and
you should use new-style classes, which means you need to subclass it from
object:

class Document(object ):

def __init__(self):
self.haveWords = set()


Diez

[Alejandro]

Re: making objects with individual attributes!

Thanks to all!!! Now it works!