human
Merge K sorted arrays of different sizes | ( Divide and Conquer Approach ) | Function to merge two arrays.
array to store the result after merging l and r.
variables to store the current pointers for l and r.
loop to merge l and r using two pointer.
Function to merge all the arrays.
2D - array to store the results of a step temporarily.
Loop to make pairs of arrays and merge them.
To clear the data of previous steps.
Returning the required output array.
Driver Code.
Input arrays.
Merged sorted array"
How can the above be solved in Python?

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Give me a code to merge K sorted arrays of different sizes and the other steps required?
assistant
#Here is code to merge K sorted arrays of different sizes and the other steps required.
 def mergeTwoArrays ( l , r ) :
	ret = [ ]
	l_in , r_in = 0 , 0
	while l_in + r_in < len ( l ) + len ( r ) :
		if ( l_in != len ( l ) and ( r_in == len ( r ) or l [ l_in ] < r [ r_in ] ) ) :
			ret . append ( l [ l_in ] )
			l_in += 1
		else :
			ret . append ( r [ r_in ] )
			r_in += 1
	return ret
def mergeArrays ( arr ) :
	arr_s = [ ]
	while len ( arr ) != 1 :
		arr_s [ : ] = [ ]
		for i in range ( 0 , len ( arr ) , 2 ) :
			if i == len ( arr ) - 1 :
				arr_s . append ( arr [ i ] )
			else :
				arr_s . append ( mergeTwoArrays ( arr [ i ] , arr [ i + 1 ] ) )
		arr = arr_s [ : ]
	return arr [ 0 ]
if __name__ == " _ _ main _ _ " :
	arr = [ [ 3 , 13 ] , [ 8 , 10 , 11 ] , [ 9 , 15 ] ]
	output = mergeArrays ( arr )
	for i in range ( 0 , len ( output ) ) :
		print ( output [ i ] , end = " ▁ " )