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// add a function as an element of a dictionary
>>> {1: lambda: len('ciao')}
>>> {1: <function <lambda> at 0x101d530>}
// get element with specified key
>>> {1: lambda: len('ciao')}[1]
>>> <function <lambda> at 0x101d5f0>

>>> a = {1: lambda: len('ciao')}[1]
>>> a
>>> <function <lambda> at 0x101d670>
// run the function-element
>>> a()
>>> 4

// or run it directly from here!
>>> {1: lambda: len('ciao')}[1]()
>>> 4