如何为列表中的项目分配类对象？ （蟒蛇）

Question

I defined a class with 3 objects inside of it:

class abc():
     __slots___ = ('1','2',3')

From here, I made a list containing around a thousand elements:

lst = [[abc,dfg,9292],[ksdj,lkjsd,9239],...]

The third element inside each element is always a number. I want to assign the object called 3 in my class to that third element so that I can sort the list.

To clarify some misconceptions object 3 is actually quantity. Therefore, the third element in each element is considered a quantity.

Answer 1

It's unclear whether you're trying to sort the list, create instances of abc from elements in your list, or something totally different.

Assuming you wanted to sort your list by the 3rd element of each sublist:

lst.sort(key = lambda x: x[2])

would sort your list in place.

If you want to create an object of type abc from each element in your list, you need to figure out what you're doing with the data from each list element. If you simply want to store it as instance variables, you could do something like this:

class ABC():
    __slots__ = ('a', 'b', 'c')
    def __init__(self, a, b, c):
        self.a = a
        self.b = b
        self.c = c

obj_list = [ABC(*x) for x in lst]

You could then sort this resulting list of objects if that's what you want.