[Tutor] creating dict of dict : similar to perl hash of hash

Alan Gauld alan.gauld at btinternet.com
Tue Mar 6 19:25:27 CET 2012

On 06/03/12 17:50, Abhishek Pratap wrote:

> I am looking for a way to build dictionaries of dict in python.

Thats not a problem, you just nest them:

d1 = {key: value,...} # a single level dictionary

d2 = {key: d1, ...}   # a dictionary of dictionaries...

d3 = { key1: {key2: value, ...}, ...}  # and on one line

> For example in perl I could do
> my $hash_ref = {};
> $hash->{$a}->{$b}->{$c} = "value";
> if (exists $hash->{$a}->{$b}->{$c} ){ print "found value"}
> Can I do something similar with dictionaries in Python.

No idea, I haven't done any Perl for over 10 years.
What does that actually do?

Alan G
Author of the Learn to Program web site

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