l indices contained in
it:  1

    
    
    >>> b = Bank()                                                                                                                                                                                                                                                                                                                                     
    >>> b[7]                                                                                                                                                                                                                                                                                                                                           
    7
    >>> b[-3:0]                                                                                                                                                                                                                                                                                                                                      
    -6
    >>> b[0:7:2]                                                                                                                                                                                                                                                                                                                                      
    12
    >>> bank[::]
    0 
    >>> bank['':5:{}]
    10
    

As the last example demonstrates, slices can contain just about any value, not
just integers and ` None ` , thus the ` Bank ` class must check for these
cases and use defaults if needed.

Just a word of caution – if sub-classing built-in types in Python 2, and want
to implement custom slicing behavior, you need to override the deprecated `
__getslice__() ` method ( [ documentation
](https://docs.python.org/2/reference/datamodel.html#object.__getslice__) ).

* * *

  1. Not saying that this is actually the best way to run a bank in real life, nor that (ab)using slices like this will make you popular with people using your sliceable class…  ↩ 

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Author  [ Peter Lamut ](https://blog.peterlamut.com/author/peterlamut/) Posted
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