Added xrange compatibility for Python 3

Project Euler/Problem 11/sol1.py

@@ -24,6 +24,11 @@
 01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48
 '''
 
+try:
+	xrange			#Python 2
+except NameError:
+	xrange = range	#Python 2
+
 def largest_product(grid):
 	nColumns = len(grid[0])
 	nRows = len(grid)
@@ -33,8 +38,8 @@ def largest_product(grid):
 	rlDiagProduct = 0
 
 	#Check vertically, horizontally, diagonally at the same time (only works for nxn grid)
-	for i in range(nColumns):
-		for j in range(nRows-3):
+	for i in xrange(nColumns):
+		for j in xrange(nRows-3):
 			vertProduct = grid[j][i]*grid[j+1][i]*grid[j+2][i]*grid[j+3][i]
 			horzProduct = grid[i][j]*grid[i][j+1]*grid[i][j+2]*grid[i][j+3]
 
@@ -58,6 +63,6 @@ def largest_product(grid):
 		for line in file:
 			grid.append(line.strip('\n').split(' '))
 
-	grid = [[int(i) for i in grid[j]] for j in range(len(grid))]
+	grid = [[int(i) for i in grid[j]] for j in xrange(len(grid))]
 
 	print(largest_product(grid))