Accessing class variables from a list comprehension in the class definition

Question

How do you access other class variables from a list comprehension within the class definition? The following works in Python 2 but fails in Python 3:

class          


        

Answer 1

In my opinion it is a flaw in Python 3. I hope they change it.

Old Way (works in 2.7, throws NameError: name 'x' is not defined in 3+):

class A:
    x = 4
    y = [x+i for i in range(1)]

NOTE: simply scoping it with A.x would not solve it

New Way (works in 3+):

class A:
    x = 4
    y = (lambda x=x: [x+i for i in range(1)])()

Because the syntax is so ugly I just initialize all my class variables in the constructor typically