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Groups > comp.lang.python > #64617

Re: Initialise dictionary of dictionary

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On 2014-01-23 07:15, Ayushi Dalmia wrote:
> I need to initialise a dictionary of dictionary with float values.
> I do not know the size of the dictionary beforehand. How can we do
> that in Python --
 
Either

  d = {}

or, if you want

  from collections import defaultdict
  d = defaultdict(float)
  print(d["Hello"])

If you really do want a dict-of-dict that defaults to floats, you can
do

  d = defaultdict(lambda: defaultdict(float))
  print(d[3141]["Hello"])

-tkc

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Initialise dictionary of dictionary Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-23 07:15 -0800
  Re: Initialise dictionary of dictionary Tim Chase <python.list@tim.thechases.com> - 2014-01-23 09:30 -0600
    Re: Initialise dictionary of dictionary Ayushi Dalmia <ayushidalmia2604@gmail.com> - 2014-01-23 21:42 -0800
  Re:Initialise dictionary of dictionary Dave Angel <davea@davea.name> - 2014-01-23 10:34 -0500
  Re: Initialise dictionary of dictionary Tim Chase <python.list@tim.thechases.com> - 2014-01-23 09:41 -0600

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