human
What is a code to print matrix elements from top and the other steps required given the following:
Print matrix elements from top | Function to traverse the matrix diagonally upwards.
Store the number of rows.
Initialize queue.
Push the index of first element i . e . , ( 0 , 0 ).
Get the front element.
Pop the element at the front.
Insert the element below if the current element is in first column.
Insert the right neighbour if it exists.
Driver Code.
Given vector of vectors arr.
Function call"
How can the above be solved in Python?
assistant
#Here is code to print matrix elements from top and the other steps required.
 def printDiagonalTraversal ( nums ) :
	m = len ( nums )
	q = [ ]
	q . append ( [ 0 , 0 ] )
	while ( len ( q ) != 0 ) :
		p = q [ 0 ]
		q . pop ( 0 ) ;
		print ( nums [ p [ 0 ] ] [ p [ 1 ] ] , end = " ▁ " )
		if ( p [ 1 ] == 0 and p [ 0 ] + 1 < m ) :
			q . append ( [ p [ 0 ] + 1 , p [ 1 ] ] ) ;
		if ( p [ 1 ] + 1 < len ( nums [ p [ 0 ] ] ) ) :
			q . append ( [ p [ 0 ] , p [ 1 ] + 1 ] ) ;
if __name__ == " _ _ main _ _ " :
	arr = [ [ 1 , 2 , 3 ] , [ 4 , 5 , 6 ] , [ 7 , 8 , 9 ] ]
	printDiagonalTraversal ( arr ) ;