无法在Python的打印中添加变量

My code:

year=[51-52,53,55,56,58,59,60,61]
photo=[{70,72,73},{64,65,68},{79,80,81,82},{74,77,78},{60,61,62},{84,85,87},{57,58,59},{53,54,55,56}]

for i in range(7):
    print "<img src=\"https://files.getdropbox.com/u/100000/Akuja/",year,"/P10104",photo,".JPG\">"
year=[51-52,53,55,56,58,59,60,61]
ph