How to create and define in one line a 2D list of class objects in Python

[T2ioTD]

I am attempting to create a hex based strategy game, and I am using Pygame for the first time. Also, while I have many years of experience in coding, this is the first time I use classes and objects.

The Hex class needs to be defined with x and y, and when I try to create a MAP list made of hex objects, I do not know how to define in one line the instances:

Class Hex():
  def __init__(self, x, y):
  self.x = x
  self.y = y 
 
 hex_map =  [[Hex(i,j) for j in range(1,10)] for i in range(1,10)]

Python generates an error because the variable i was not declared when Hex(i,j) is introduced... Is there a way to do it?