In Lower Saxony, various abstract data types such as stack, queue, dynamic array and binary tree are treated in the school. The interfaces to this are explained in a handout (vgl. PDF-Datei).
You can download the classes for Python here and use it freely, but without warranty.
Some additions to the given interfaces have been programmed, such as default values at certain points and traversing through the trees. Have fun trying it out!
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