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  1. """Response to StackOverflow Question: https://stackoverflow.com/q/62377553/2694511"""
  2.  
  3. from collections import defaultdict
  4.  
  5. num = ['0', '2', '3', '0','7']
  6. letters = ['a', 'b', 'c', 'd','e']
  7.  
  8. num_letter_dict = defaultdict(list)
  9. for n, letter in zip(num, letters):
  10. num_letter_dict[n].append(letter)
  11.  
  12. print(num_letter_dict)
Success #stdin #stdout 0.02s 9084KB
stdin
Standard input is empty
stdout
defaultdict(<class 'list'>, {'0': ['a', 'd'], '2': ['b'], '3': ['c'], '7': ['e']})