Dict Comprehensions

New In Python 2.7 and 3.0

Example

• Question

  • Input

    {'a': ['1', '2', '2'], 'b': ['4', '4', '5', '5']}
    

  • Output

    {'a': ['1', '2'], 'b': ['4', '5']}
    

• Answer

  In [1]: from more_itertools import unique_everseen
  
  In [2]: nodes = {'a': ['1', '2', '2'], 'b': ['4', '4', '5', '5']}
  
  In [3]: {k: list(unique_everseen(v)) for k, v in nodes.iteritems()}
  Out[3]: {'a': ['1', '2'], 'b': ['4', '5']}
  

References

[1] PEPS@Python Developer's Guide, PEP 274 -- Dict Comprehensions

[2] The Python Tutorial@Python Docs, 5. Data Structures — 5.5. Dictionaries