problem with list return type?

my list has value such as

m=[['na','1','2']['ka','31','45']['ra','3','5']

d=0
r=2

t=m[d][r]
print t         # this is givin number i.e 2

Now when I use this value

u=[]
u=m[t]

I am getting an err msg saying type error list does t开发者_StackOverflow社区ake str values...

i want to use like this how can i convert that t into a integer??

please suggest..

thanks..

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Your problem is that you can't index into a list using a string. To convert t to an integer use int:

u=m[int(t)]

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Use int(t) as the index, not t itself, since t is a string and to index a variable you need an integer, not a string, as the error message is telling you.