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  1. a=dict()
  2. a['--files'] = '1,2,3,4'
  3.  
  4. print (a.get('--files', '').split(',') or None)
  5. print (a.get('--dirs', '').split(',') or None)
  6.  
Success #stdin #stdout 0.01s 7896KB
stdin
Standard input is empty
stdout
['1', '2', '3', '4']
['']