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Asked: 2026-06-17T11:12:41+00:00

What does appending [0] to methods in python do? For example, in the following

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What does appending [0] to methods in python do?
For example, in the following [0] is appended to a method. 

print "Unexpected error:", sys.exc_info()[0]
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1 Answer

  1. Editorial Team

    It calls the method and gets the 0th element from the returned value. 

    >>> def test():
...   return ['item0', 'item1']
...
>>> test()
['item0', 'item1']
>>> test()[0]
'item0'
>>>
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