beutifulsoup

[luca72]

Hello
I try to use beautifulsoup
i have this:
sito = urllib.urlopen('http://www.prova.com/')
esamino = BeautifulSoup(sito)
luca = esamino.findAll('tr', align='center')

print luca[0]

>><tr align="center"><th width="5%"><a onclick="t('Only|G|BoT|05','#1');" href="#">#1</a></th><td width="10%">44.4MB</td><td width="90%" align="left"><font color="orange"> Pc-prova.rar </font></td></tr>

I need to get the following information:
1)Only|G|BoT|05
2)#1
3)44.4MB
4)Pc-prova.rar
with: print luca[0].a.string    i get #1
with print luca[0].td.string    i get 44.4MB
can you explain me how to get the others two value
Thanks
Luca