Notes

#Number of queens
print ("Enter the number of queens")
N = int(input())

#chessboard
#NxN matrix with all elements 0
board = [[0]*N for _ in range(N)]

def is_attack(i, j):
#checking if there is a queen in row or column
for k in range(0,N):
if board[i][k]==1 or board[k][j]==1:
return True
#checking diagonals
for k in range(0,N):
for l in range(0,N):
if (k+l==i+j) or (k-l==i-j):
if board[k][l]==1:
return True
return False

def N_queen(n):
#if n is 0, solution found
if n==0:
return True
for i in range(0,N):
for j in range(0,N):
'''checking if we can place a queen here or not
queen will not be placed if the place is being attacked
or already occupied'''
if (not(is_attack(i,j))) and (board[i][j]!=1):
board[i][j] = 1
#recursion
#wether we can put the next queen with this arrangment or not
if N_queen(n-1)==True:
return True
board[i][j] = 0

return False

N_queen(N)
for i in board:
print (i)