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  1. def no_trailing_comma(x):
  2. return x + [10]
  3.  
  4. def trailing_comma(x):
  5. return x + [10],
  6.  
  7. data = [1, 2, 3]
  8.  
  9. print("With trailing comma", trailing_comma(data))
  10. print("With no trailing comma", no_trailing_comma(data))
Success #stdin #stdout 0.02s 27664KB
stdin
Standard input is empty
stdout
With trailing comma ([1, 2, 3, 10],)
With no trailing comma [1, 2, 3, 10]