CODEWITHSUNDEEP
pythonpython-3.xoopinstance-variables
ramses
ramses

Reputation: 313

Can I access a property of an object containing a list of objects of another class

Let's say I have something like this:

class A:
    def __init__(self, name, bs):
        self.aname = name
        self.bees = bs
    aname = ''
    bees = []

class B:
    def __init__(self, name):
        self.bname= name
    bname= ''
    def get_aname():
        return aname # can I get this somehow 

aobj = A('name of class A', [B('1'), B('2'), B('3')])

aobj.bees[0].get_aname()  # result should be 'name of class A'

Is there any way I could get the name of the class A?

Upvotes: 4

Views: 53

Answers (1)

jpp
jpp

Reputation: 164663

aname is an instance variable. To access this from instances of B, you need to pass an instance of A to B in order for your B instance to access aname.

But you can't pass an instance of A before it's instantiated. Instead, you can define your list of B instances and add them as an attribute of aobj in a subsequent step:

class A:
    def __init__(self, name, bs=None):
        self.aname = name
        self.bees = bs
    aname = ''
    bees = []

class B:
    def __init__(self, name, a_inst):
        self.a_inst = a_inst
        self.bname= name
    bname= ''
    def get_aname(self):
        return self.a_inst.aname

aobj = A('name of class A')
L = [B('1', aobj), B('2', aobj), B('3', aobj)]
aobj.bees = L

aobj.bees[0].get_aname()  # 'name of class A'

Upvotes: 1

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