Python add methods of objects to containing list [duplicate]-CodePudding

I have a list containing objects of same class. now I want to make that list a container class that relates to all methods of the objects it contains as you can see in my example below. But since I have a lot of methods, I don't want to explicitly write them down in the containing container-class like this again:

module fe.py

class foo:

    def __init__(self,weight,age):
        self.weight = weight
        self.age = age

    def get_weight(self):
        return self.weight

    def get_age(self):
        return self.age

    def multiply(self):
        return self.weight*self.age


class foo_list(list):

    def __init__(self,foo_tuple):
        list.__init__(self,foo_tuple)

    def __getattribute__(self,name):
        return [getattr(x,name)() for x in self]

Now an execution example:

import fe

u=fe.foo_list((fe.foo(1,2),fe.foo(3,4)))
u.multiply
[2, 12]
u.multiply()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'list' object is not callable

But this way the method-attribute got related to the result. but I want it to be a method to call just like in the contained objects

CodePudding user response：

def __getattribute__(self,name):
    return [getattr(x,name)() for x in self]

__getattribute__ returns a list, which means just u.multiply is a list; which you're then trying to call. If you want this magic attribute to pose as a method, then __getattribute__ will need to return a callable function:

def __getattribute__(self, name):
    def f():
        return [getattr(x, name)() for x in self]
    return f