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  1. from itertools import combinations
  2.  
  3. input = ['h', 'e', 'l', 'l', 'o']
  4.  
  5. output = sum([map(list, combinations(input, i)) for i in range(len(input) + 1)], [])
  6.  
  7. print output
Success #stdin #stdout 0.05s 63016KB
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stdin
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[[], ['h'], ['e'], ['l'], ['l'], ['o'], ['h', 'e'], ['h', 'l'], ['h', 'l'], ['h', 'o'], ['e', 'l'], ['e', 'l'], ['e', 'o'], ['l', 'l'], ['l', 'o'], ['l', 'o'], ['h', 'e', 'l'], ['h', 'e', 'l'], ['h', 'e', 'o'], ['h', 'l', 'l'], ['h', 'l', 'o'], ['h', 'l', 'o'], ['e', 'l', 'l'], ['e', 'l', 'o'], ['e', 'l', 'o'], ['l', 'l', 'o'], ['h', 'e', 'l', 'l'], ['h', 'e', 'l', 'o'], ['h', 'e', 'l', 'o'], ['h', 'l', 'l', 'o'], ['e', 'l', 'l', 'o'], ['h', 'e', 'l', 'l', 'o']]
https://ideone.com/5R7SQd
language:
Python (PyPy 2.7.13)
created:
3 days ago
visibility:
public

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