Producing a value based off a coordinate system

Question

I'm stuck on a problem where we have to

build_board(coords,size):

Given a list of coordinates for the locations of 
int size, build a board (a list of lists of Booleans) of that size, and mark cells with a queen
True. 

Examples:

 build_board([(0,0)],1) → [[True]]

 build_board([(0,0)],2) → [[True,   False], [False, False]]

 build_board([(0,0),(1,1)],2) → [[True, False], [False, True]]

The context is that we made a function to make the board as such

def build_empty_board(size):
    size=int(size)
    ans = [ [False for x in range(size)] for x in range(size) ]
    return ans

However I don't know how to code a loop that checks each board made and produce values off a coordinate system. Could anyone guide me on how to code this?

Answer 1

What about this approach:

def build_board(coords, size):
    # if any(i < 0 for coord in coords for i in coord):
    #     return
    board = [[False] * size for _ in range(size)]
    for (row, col) in coords:
        if row < 0 or col < 0:
            return
        board[row][col] = True
    return board

print(build_board([(0,0)],1)) #[[True]]
print(build_board([(0,0)],2)) #[[True,   False], [False, False]]
print(build_board([(0,0),(1,1)],2)) #[[True, False], [False, True]]
print(build_board([(0,0),(-1,3)],2)) #None