* Update basic_binary_tree.py
* Update basic_binary_tree.py
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* adding static type checking to basic_binary_tree.py
* Add static type checking to functions with None return type
* Applying code review comments
* Added missing import statement
* fix spaciing
* "cleaned up depth_of_tree"
* Add doctests and then streamline display() and is_full_binary_tree()
Co-authored-by: Christian Clauss <cclauss@me.com>
* Tighten up psf/black and flake8
* Fix some tests
* Fix some E741
* Fix some E741
* updating DIRECTORY.md
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