[issue39192] relationlist module

[wyz23x2]

wyz23x2 <wyz23x2 at 163.com> added the comment:

I've written a handy tool--RelationList. This type can easily create relations between elements in lists.

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Added file: https://bugs.python.org/file48821/relationlist.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39192>
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