How to implement key of key in python?

I'm migrating from Perl to Python and unable to identify the equivalent of key of key concept. The following codes run well, import csv attr = {}

Re: How to implement key of key in python?

On Saturday, May 10, 2014 10:30:06 AM UTC+8, MRAB wrote: > On 2014-05-10 02:22, I wrote: > > > I'm migrating from Perl to Python and unable to identify the equivalent of > > key of key concept. The following codes run well, > > > import csv > > > attr = {} > > > with open('test.txt','rb') as t