Hello there Abhi, : I am looking for a way to build dictionaries of dict in python. : : For example in perl I could do : : my $hash_ref = {}; : $hash->{$a}->{$b}->{$c} = "value"; : if (exists $hash->{$a}->{$b}->{$c} ){ print "found value"}
Autovivifying. That's what the perl-heads call that. : Can I do something similar with dictionaries in Python. I suspect you want to look into the collections module. Here's an example of how to use it to create a two-level dictionary with the same autovivifying behaviour you are accustomed to in perl. >>> import collections >>> d = collections.defaultdict(collections.defaultdict) >>> a,b,c = range(3) >>> d[a][b] = c >>> d defaultdict(<type 'collections.defaultdict'>, {0: defaultdict(None, {1: 2})}) Have a look at the collections module. See if that scratches your itch. Good luck, -Martin -- Martin A. Brown http://linux-ip.net/ _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor