Euler 82 - Doesn't Work Yet

gistfile1.txt

file = open('matrix2.txt','r').readlines()

# i thought maybe if we worked the box in two sections- from the top down and from the bottom up
# meeting in the middle, where the target cell was- but this doesn't appear to work either
array = []
for i in range (0,len(file)):
	line = file[i].split(',')
	array.append(line)
n = len(array)

for y in range (0,n):
	array = []
	for i in range (0,len(file)):
		line = file[i].split(',')
		array.append(line)
	for r in range (0,y+1):
		for s in range (n-2,-1,-1):
			if r == 0:
				array[r][s]=int(array[r][s])+min(int(array[r][s+1]),int(array[r+1][s]))
			if r == n-1:
				array[r][s]=int(array[r][s])+min(int(array[r][s+1]),int(array[r-1][s]))
			if r < n-1 and r > 0:
				array[r][s]=int(array[r][s])+min(int(array[r+1][s]),int(array[r-1][s]),int(array[r][s+1]))			
	for r in range (n-1,y,-1):
		for s in range (n-2,-1,-1):
			if r == 0:
				array[r][s]=int(array[r][s])+min(int(array[r][s+1]),int(array[r+1][s]))
			if r == n-1:
				array[r][s]=int(array[r][s])+min(int(array[r][s+1]),int(array[r-1][s]))
			if r < n-1 and r > 0:
				array[r][s]=int(array[r][s])+min(int(array[r+1][s]),int(array[r-1][s]),int(array[r][s+1]))
	print array[y][0]