Question

How do I create a dictionary in python whose values are also a dictionary? Basically, my question is that I have this list of lists:

['http://a11y.in/a11ypi/idea/a11y_firesafety.html',
 ['lang:hi', 'lang:kn'],
 ['a11y_firesafety.html:div1', 'a11y_firesafety.html:div1'],
 ['hi', 'kn']
]

and I want to convert it to:

{'http://a11y.in/a11ypi/idea/a11y_firesafety.html':
  {'lang:hi':
     {'lang:kn':
        {'a11y_firesafety.html:div1':
           {'a11y_firesafety.html:div1': {'hi', 'kn'}}}}}}

Can someone suggest me a way to do it? I tried using multidimensional dictionaries but they were of no use. Please help!

Answer 1

Try this:

def forget_torpedoes(mylist):
    return reduce(lambda acc, x: {x : acc}, reversed(mylist))

This will work for a flat list as follows:

In [9]: forget_torpedoes( [5, 6, 7, 8] )
Out[9]: {5: {6: {7: 8}}}

I realize that doesn’t answer (all) of your question, since you have nested lists. But then again, it should get you most of the way 🙂