Need a help

[Deepak Pant]

Hello Foss Python Community,
           I have a query
        
Class User:
     def __init__(self):
            self.name=''
            self.id=''
     def setuser(self,name,id):
            self.name=name
            self.id=id


User().setuser('deepak',5)
User().setuser('munna',6)
User().setuser('howday',9)


is there any easier solution i can return objects id that matches name
say as

for u in User:
    if(u.name=='deepak'):
        print u.id

I need to find out objects that matches attributes
Need to solve this problem Thanks in advance


Regards
Deepak Pant
in...@xnimbus.net

[Lava Kafle]

Hashmap !!!!
Lava Kafle
Ms by Research in Computer Science 

Kathmandu University
cell: 

9841224387
9801034557

Deepak Pant
in...@xnimbus.net

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[Kailash Budhathoki]

Hi Deepak, 

Your requirement seems interesting. Without asking much more about your intention, you can use weakrefs to keep track of the references.

Here's a sample code for your requirement;

from collections import defaultdict

import weakref

_ref_tracker = defaultdict(list)

class TrackRefs(object):

    def __init__(self):

        _ref_tracker[self.__class__].append(weakref.ref(self))

    def get_objs(self):

        for ref in _ref_tracker[self.__class__]:

            if ref():

                yield ref()

class User(TrackRefs):

    def __init__(self, name, id):

        super(User, self).__init__()

        self.name = name

        self.id = id

user1 = User('Harke', 6)

user2 = User('Birkhe', 9)

user3 = User('Chyante', 69)

for obj in User("", "").get_objs(): #remember i am using an extra object here   

    if obj.name == 'Chyante':

        print obj.id 

You could have easily used default dictionary class in python to keep track of username and ids easily. I would rather use a simple dictionary as a member variable than keep track of object references ;) .

--

Kailash Budhathoki