[Tutor] compare

[Shi Mu]

What does this line 11 mean in the following code?

1 # calc.py
    2 def calc(seq):
    3   maximum = 0
    4   max_item = []
    5   for i in seq:
    6     product = (i[0]*100 + i[1]*10 + i[2]) * (i[3]*10 + i[4])
    7     if product > maximum:
    8        maximum = product
    9        max_item = i
   10     elif product == maximum:
   11        max_item += ','+i
   12   return max_item, maximum
   13
   14 seq = [ [5,6,7,8,9], [5,6,7,9,8] ]
   15 max_item, maximum = calc(seq)
   16 print "Maximum at", max_item, ",product", maximum