finding 2 max values in an array in python

[marienbad]

a = [1,2,3,4,5]

high1 = 0
high2 = 0

for item in a:
	if item > high1:
		high1 = item
		pos = a.index(item)
		
print str(high1)
print str(pos)

for item in a:
	if item > high2 and item < high1:
		high2 = item
		pos = a.index(item)
		
print str(high2)
print str(pos)