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Groups > comp.lang.python > #109811

Re: fast dictionary initialization

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On 2016-06-10 14:07, maurice wrote:
> example:
> valuesList = [1,2,3]
> keysList   = ['1','2','3']
> 
> So the dictionary can basically convert string to int:
> 
> dictionary = {'1':1, '2':2, '3':3}

A couple similar options:


The most straightforward translation of your description:

  opt1 = dict(zip(keysList, valuesList))
  print(opt1["2"])

And one where you generate the strings on the fly:

  opt2 = dict((str(i), i) for i in range(1, 4))
  print(opt2["2"])

And one where you use the int() function instead of a mapping because
the whole idea of storing a dict worth of string-numbers-to-numbers
seems somewhat silly to me:

  print(int("2"))

-tkc

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fast dictionary initialization maurice <mauricioliveiraguarda@gmail.com> - 2016-06-10 14:07 -0700
  Re: fast dictionary initialization Random832 <random832@fastmail.com> - 2016-06-10 17:15 -0400
  Re: fast dictionary initialization Tim Chase <python.list@tim.thechases.com> - 2016-06-10 18:20 -0500

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