Python string format using map of arrays

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I have a thesaurus (dictionary) of values:

words = { 
  'hot' : ['hot', 'scalding', 'warm'],
  'cold' : ['cold', 'frigid', 'freezing'],
   ...}

And I would like to use this thesaurus to randomly format strings

'the water is {word.cold}'.format(word=words)

But this (as expected) is inserting the entire array into the string. Is there a way to pass a choice function to format or do I need to write my own custom format functionality including the word/key matching?

asked 32 secs ago

Comart

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