The final Python 2 release marks the end of an era

For you Python users who have been unwilling (or unable) to upgrade to version 3, there’s yet another reason to get motivated: python.org has released Python 2.7.18, the absolute last official release for Python 2.  While it doesn’t add much in terms of f… Read more

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Sort Binary Tree by Levels Using Python

The challenge You are given a binary tree: Your task is to return the list with elements from tree sorted by levels, which means the root element goes first, then root children (from left to right) are second and third, and so on. Return empty list if roo... (more…)

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