array 2d to 1d python

 int array[width * height];

 int SetElement(int row, int col, int value)
 {
    array[width * row + col] = value;  
 }

# Python code to demonstrate 
# flattening a 2d numpy array 
# into 1d array 
  
import numpy as np 
  
ini_array1 = np.array([[1, 2, 3], [2, 4, 5], [1, 2, 3]]) 
  
# printing initial arrays 
print("initial array", str(ini_array1)) 
  
# Multiplying arrays 
result = ini_array1.flatten() 
  
# printing result 
print("New resulting array: ", result)