取一个字符串的所有靠近前面的大写字母

比如有这样的字符串

TWO INDUSTRIAL STYLE WALL LIGHTS  also a ceramic figure of a cobbler and a group of minor pictures  

希望得到的是： TWO INDUSTRIAL STYLE WALL LIGHTS  

直接上代码

aa = "NINE CARAT GOLD GARNET RING AND ANOTHER GOLD RING Along with a gold and sapphire set pendant on chain, pearl and diamond set pend "
aa1 = aa.replace(' ','=')
ii = 0
for i in aa1:
    result = i.islower()
    print result
    if 'al' in str(result):
        ii = ii + 1
    else:
        if 'rue' in str(result):
            break

if '=' in str(aa1[-2]):
    item_name = item_desc[:ii - 1]
else:
    item_name = item_desc[:ii]

print item_name