[Tutor] __getitem__ another problem

[Alan Gauld]

On 23/11/16 06:26, monikajg at netzero.net wrote:

> I do not understand how numbermap.__getitem__ brings back month's key.

numbermap returns the integer corresponding to the key.
That number is then used by sorted as the basis for
sorting month. So for the first entry sorted receives
the value 1, for the second it gets 2. and so on.
It then prints the keys corresponding to those
values.

> month = dict(one='January',
>                  two='February',
>                  three='March',
>                  four='April',
>                  five='May')
> numbermap = {'one': 1, 'two': 2, 'three': 3, 'four': 4, 'five': 5}
> sorted(month, key=numbermap.__getitem__)
> ['one', 'two', 'three', 'four', 'five']

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Alan G
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